text:
// Version: v1.0.pre-202-g6cff4b2
// Last commit: 6cff4b2 (2012-10-16 21:23:04 -0700)

(function() {
/*global __fail__*/

/**
Ember Debug

@module ember
@submodule ember-debug
*/

/**
@class Ember
*/

if ('undefined' === typeof Ember) {
  Ember = {};

  if ('undefined' !== typeof window) {
    window.Em = window.Ember = Em = Ember;
  }
}

Ember.ENV = 'undefined' === typeof ENV ? {} : ENV;

if (!('MANDATORY_SETTER' in Ember.ENV)) {
  Ember.ENV.MANDATORY_SETTER = true; // default to true for debug dist
}

/**
  Define an assertion that will throw an exception if the condition is not
  met.  Ember build tools will remove any calls to Ember.assert() when
  doing a production build. Example:

      // Test for truthiness
      Ember.assert('Must pass a valid object', obj);
      // Fail unconditionally
      Ember.assert('This code path should never be run')

  @method assert
  @param {String} desc A description of the assertion.  This will become
    the text of the Error thrown if the assertion fails.

  @param {Boolean} test Must be truthy for the assertion to pass. If
    falsy, an exception will be thrown.
*/
Ember.assert = function(desc, test) {
  if (!test) throw new Error("assertion failed: "+desc);
};

/**
  Display a warning with the provided message. Ember build tools will
  remove any calls to Ember.warn() when doing a production build.

  @method warn
  @param {String} message A warning to display.
  @param {Boolean} test An optional boolean. If falsy, the warning
    will be displayed.
*/
Ember.warn = function(message, test) {
  if (!test) {
    Ember.Logger.warn("WARNING: "+message);
    if ('trace' in Ember.Logger) Ember.Logger.trace();
  }
};

/**
  Display a deprecation warning with the provided message and a stack trace
  (Chrome and Firefox only). Ember build tools will remove any calls to
  Ember.deprecate() when doing a production build.

  @method deprecate
  @param {String} message A description of the deprecation.
  @param {Boolean} test An optional boolean. If falsy, the deprecation
    will be displayed.
*/
Ember.deprecate = function(message, test) {
  if (Ember && Ember.TESTING_DEPRECATION) { return; }

  if (arguments.length === 1) { test = false; }
  if (test) { return; }

  if (Ember && Ember.ENV.RAISE_ON_DEPRECATION) { throw new Error(message); }

  var error;

  // When using new Error, we can't do the arguments check for Chrome. Alternatives are welcome
  try { __fail__.fail(); } catch (e) { error = e; }

  if (Ember.LOG_STACKTRACE_ON_DEPRECATION && error.stack) {
    var stack, stackStr = '';
    if (error['arguments']) {
      // Chrome
      stack = error.stack.replace(/^\s+at\s+/gm, '').
                          replace(/^([^\(]+?)([\n$])/gm, '{anonymous}($1)$2').
                          replace(/^Object.<anonymous>\s*\(([^\)]+)\)/gm, '{anonymous}($1)').split('\n');
      stack.shift();
    } else {
      // Firefox
      stack = error.stack.replace(/(?:\n@:0)?\s+$/m, '').
                          replace(/^\(/gm, '{anonymous}(').split('\n');
    }

    stackStr = "\n    " + stack.slice(2).join("\n    ");
    message = message + stackStr;
  }

  Ember.Logger.warn("DEPRECATION: "+message);
};

/**
  Display a deprecation warning with the provided message and a stack trace
  (Chrome and Firefox only) when the wrapped method is called.

  Ember build tools will not remove calls to Ember.deprecateFunc(), though
  no warnings will be shown in production.

  @method deprecateFunc
  @param {String} message A description of the deprecation.
  @param {Function} func The function to be deprecated.
*/
Ember.deprecateFunc = function(message, func) {
  return function() {
    Ember.deprecate(message);
    return func.apply(this, arguments);
  };
};

window.ember_assert         = Ember.deprecateFunc("ember_assert is deprecated. Please use Ember.assert instead.",               Ember.assert);
window.ember_warn           = Ember.deprecateFunc("ember_warn is deprecated. Please use Ember.warn instead.",                   Ember.warn);
window.ember_deprecate      = Ember.deprecateFunc("ember_deprecate is deprecated. Please use Ember.deprecate instead.",         Ember.deprecate);
window.ember_deprecateFunc  = Ember.deprecateFunc("ember_deprecateFunc is deprecated. Please use Ember.deprecateFunc instead.", Ember.deprecateFunc);

})();

// Version: v1.0.pre-202-g6cff4b2
// Last commit: 6cff4b2 (2012-10-16 21:23:04 -0700)

(function() {
/*globals Em:true ENV */

/**
@module ember
@submodule ember-metal
*/

/**
  All Ember methods and functions are defined inside of this namespace.
  You generally should not add new properties to this namespace as it may be
  overwritten by future versions of Ember.

  You can also use the shorthand "Em" instead of "Ember".

  Ember-Runtime is a framework that provides core functions for
  Ember including cross-platform functions, support for property
  observing and objects. Its focus is on small size and performance. You can
  use this in place of or along-side other cross-platform libraries such as
  jQuery.

  The core Runtime framework is based on the jQuery API with a number of
  performance optimizations.

  @class Ember
  @static
  @version 1.0.pre
*/

if ('undefined' === typeof Ember) {
  // Create core object. Make it act like an instance of Ember.Namespace so that
  // objects assigned to it are given a sane string representation.
  Ember = {};
}

// Default imports, exports and lookup to the global object;
var imports = Ember.imports = Ember.imports || this;
var exports = Ember.exports = Ember.exports || this;
var lookup  = Ember.lookup  = Ember.lookup  || this;

// aliases needed to keep minifiers from removing the global context
exports.Em = exports.Ember = Em = Ember;

// Make sure these are set whether Ember was already defined or not

Ember.isNamespace = true;

Ember.toString = function() { return "Ember"; };

/**
  @property VERSION
  @type String
  @default '1.0.pre'
  @final
*/
Ember.VERSION = '1.0.pre';

/**
  Standard environmental variables.  You can define these in a global `ENV`
  variable before loading Ember to control various configuration
  settings.

  @property ENV
  @type Hash
*/
Ember.ENV = Ember.ENV || ('undefined' === typeof ENV ? {} : ENV);

Ember.config = Ember.config || {};

// ..........................................................
// BOOTSTRAP
//

/**
  Determines whether Ember should enhances some built-in object
  prototypes to provide a more friendly API.  If enabled, a few methods
  will be added to Function, String, and Array.  Object.prototype will not be
  enhanced, which is the one that causes most trouble for people.

  In general we recommend leaving this option set to true since it rarely
  conflicts with other code.  If you need to turn it off however, you can
  define an ENV.EXTEND_PROTOTYPES config to disable it.

  @property EXTEND_PROTOTYPES
  @type Boolean
  @default true
*/
Ember.EXTEND_PROTOTYPES = Ember.ENV.EXTEND_PROTOTYPES;

if (typeof Ember.EXTEND_PROTOTYPES === 'undefined') {
  Ember.EXTEND_PROTOTYPES = true;
}

/**
  Determines whether Ember logs a full stack trace during deprecation warnings

  @property LOG_STACKTRACE_ON_DEPRECATION
  @type Boolean
  @default true
*/
Ember.LOG_STACKTRACE_ON_DEPRECATION = (Ember.ENV.LOG_STACKTRACE_ON_DEPRECATION !== false);

/**
  Determines whether Ember should add ECMAScript 5 shims to older browsers.

  @property SHIM_ES5
  @type Boolean
  @default Ember.EXTEND_PROTOTYPES
*/
Ember.SHIM_ES5 = (Ember.ENV.SHIM_ES5 === false) ? false : Ember.EXTEND_PROTOTYPES;

/**
  Determines whether computed properties are cacheable by default.
  This option will be removed for the 1.1 release.

  When caching is enabled by default, you can use `volatile()` to disable
  caching on individual computed properties.

  @property CP_DEFAULT_CACHEABLE
  @type Boolean
  @default true
*/
Ember.CP_DEFAULT_CACHEABLE = (Ember.ENV.CP_DEFAULT_CACHEABLE !== false);

/**
  Determines whether views render their templates using themselves
  as the context, or whether it is inherited from the parent. This option
  will be removed in the 1.1 release.

  If you need to update your application to use the new context rules, simply
  prefix property access with `view.`:

  Before:

  ``` handlebars
  {{#each App.photosController}}
    Photo Title: {{title}}
    {{#view App.InfoView contentBinding="this"}}
      {{content.date}}
      {{content.cameraType}}
      {{otherViewProperty}}
    {{/view}}
  {{/each}}
  ```

  After:

  ``` handlebars
  {{#each App.photosController}}
    Photo Title: {{title}}
    {{#view App.InfoView}}
      {{date}}
      {{cameraType}}
      {{view.otherViewProperty}}
    {{/view}}
  {{/each}}
  ```

  @property VIEW_PRESERVES_CONTEXT
  @type Boolean
  @default true
*/
Ember.VIEW_PRESERVES_CONTEXT = (Ember.ENV.VIEW_PRESERVES_CONTEXT !== false);

/**
  Empty function.  Useful for some operations.

  @method K
  @private
  @return {Object}
*/
Ember.K = function() { return this; };

// Stub out the methods defined by the ember-debug package in case it's not loaded

if ('undefined' === typeof Ember.assert) { Ember.assert = Ember.K; }
if ('undefined' === typeof Ember.warn) { Ember.warn = Ember.K; }
if ('undefined' === typeof Ember.deprecate) { Ember.deprecate = Ember.K; }
if ('undefined' === typeof Ember.deprecateFunc) {
  Ember.deprecateFunc = function(_, func) { return func; };
}

// These are deprecated but still supported

if ('undefined' === typeof ember_assert) { exports.ember_assert = Ember.K; }
if ('undefined' === typeof ember_warn) { exports.ember_warn = Ember.K; }
if ('undefined' === typeof ember_deprecate) { exports.ember_deprecate = Ember.K; }
if ('undefined' === typeof ember_deprecateFunc) {
  exports.ember_deprecateFunc = function(_, func) { return func; };
}

// ..........................................................
// LOGGER
//

/**
  Inside Ember-Metal, simply uses the imports.console object.
  Override this to provide more robust logging functionality.

  @class Logger
  @namespace Ember
*/
Ember.Logger = imports.console || { log: Ember.K, warn: Ember.K, error: Ember.K, info: Ember.K, debug: Ember.K };

// ..........................................................
// ERROR HANDLING
//

/**
  A function may be assigned to `Ember.onerror` to be called when Ember internals encounter an error.
  This is useful for specialized error handling and reporting code.

  @event onerror
  @for Ember
  @param {Exception} error the error object
*/
Ember.onerror = null;

/**
  @private

  Wrap code block in a try/catch if {{#crossLink "Ember/onerror"}}{{/crossLink}} is set.

  @method handleErrors
  @for Ember
  @param {Function} func
  @param [context]
*/
Ember.handleErrors = function(func, context) {
  // Unfortunately in some browsers we lose the backtrace if we rethrow the existing error,
  // so in the event that we don't have an `onerror` handler we don't wrap in a try/catch
  if ('function' === typeof Ember.onerror) {
    try {
      return func.apply(context || this);
    } catch (error) {
      Ember.onerror(error);
    }
  } else {
    return func.apply(context || this);
  }
};

})();

(function() {
/**
  The purpose of the Ember Instrumentation module is
  to provide efficient, general-purpose instrumentation
  for Ember.

  Subscribe to a listener by using `Ember.subscribe`:

      Ember.subscribe("render", {
        before: function(name, timestamp, payload) {

        },

        after: function(name, timestamp, payload) {

        }
      });

  If you return a value from the `before` callback, that same
  value will be passed as a fourth parameter to the `after`
  callback.

  Instrument a block of code by using `Ember.instrument`:

      Ember.instrument("render.handlebars", payload, function() {
        // rendering logic
      }, binding);

  Event names passed to `Ember.instrument` are namespaced
  by periods, from more general to more specific. Subscribers
  can listen for events by whatever level of granularity they
  are interested in.

  In the above example, the event is `render.handlebars`,
  and the subscriber listened for all events beginning with
  `render`. It would receive callbacks for events named
  `render`, `render.handlebars`, `render.container`, or
  even `render.handlebars.layout`.

  @class Instrumentation
  @namespace Ember
  @static
*/
Ember.Instrumentation = {};

var subscribers = [], cache = {};

var populateListeners = function(name) {
  var listeners = [], subscriber;

  for (var i=0, l=subscribers.length; i<l; i++) {
    subscriber = subscribers[i];
    if (subscriber.regex.test(name)) {
      listeners.push(subscriber.object);
    }
  }

  cache[name] = listeners;
  return listeners;
};

Ember.Instrumentation.instrument = function(name, payload, callback, binding) {
  var listeners = cache[name];

  if (!listeners) {
    listeners = populateListeners(name);
  }

  if (listeners.length === 0) { return; }

  var beforeValues = [], listener, i, l;

  try {
    for (i=0, l=listeners.length; i<l; i++) {
      listener = listeners[i];
      beforeValues[i] = listener.before(name, new Date(), payload);
    }

    callback.call(binding);
  } catch(e) {
    payload = payload || {};
    payload.exception = e;
  } finally {
    for (i=0, l=listeners.length; i<l; i++) {
      listener = listeners[i];
      listener.after(name, new Date(), payload, beforeValues[i]);
    }
  }
};

Ember.Instrumentation.subscribe = function(pattern, object) {
  var paths = pattern.split("."), path, regex = "^";

  for (var i=0, l=paths.length; i<l; i++) {
    path = paths[i];
    if (path === "*") {
      regex = regex + "[^\\.]*";
    } else {
      regex = regex + path;
    }
  }

  regex = regex + "(\\..*)?";

  var subscriber = {
    pattern: pattern,
    regex: new RegExp(regex + "$"),
    object: object
  };

  subscribers.push(subscriber);
  cache = {};

  return subscriber;
};

Ember.Instrumentation.unsubscribe = function(subscriber) {
  var index;

  for (var i=0, l=subscribers.length; i<l; i++) {
    if (subscribers[i] === subscriber) {
      index = i;
    }
  }

  subscribers.splice(index, 1);
  cache = {};
};

Ember.Instrumentation.reset = function() {
  subscribers = [];
  cache = {};
};

Ember.instrument = Ember.Instrumentation.instrument;
Ember.subscribe = Ember.Instrumentation.subscribe;

})();

(function() {
/*jshint newcap:false*/

/**
@module ember-metal
*/

// NOTE: There is a bug in jshint that doesn't recognize `Object()` without `new`
// as being ok unless both `newcap:false` and not `use strict`.
// https://github.com/jshint/jshint/issues/392

// Testing this is not ideal, but we want to use native functions
// if available, but not to use versions created by libraries like Prototype
var isNativeFunc = function(func) {
  // This should probably work in all browsers likely to have ES5 array methods
  return func && Function.prototype.toString.call(func).indexOf('[native code]') > -1;
};

// From: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/map
var arrayMap = isNativeFunc(Array.prototype.map) ? Array.prototype.map : function(fun /*, thisp */) {
  //"use strict";

  if (this === void 0 || this === null) {
    throw new TypeError();
  }

  var t = Object(this);
  var len = t.length >>> 0;
  if (typeof fun !== "function") {
    throw new TypeError();
  }

  var res = new Array(len);
  var thisp = arguments[1];
  for (var i = 0; i < len; i++) {
    if (i in t) {
      res[i] = fun.call(thisp, t[i], i, t);
    }
  }

  return res;
};

// From: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/foreach
var arrayForEach = isNativeFunc(Array.prototype.forEach) ? Array.prototype.forEach : function(fun /*, thisp */) {
  //"use strict";

  if (this === void 0 || this === null) {
    throw new TypeError();
  }

  var t = Object(this);
  var len = t.length >>> 0;
  if (typeof fun !== "function") {
    throw new TypeError();
  }

  var thisp = arguments[1];
  for (var i = 0; i < len; i++) {
    if (i in t) {
      fun.call(thisp, t[i], i, t);
    }
  }
};

var arrayIndexOf = isNativeFunc(Array.prototype.indexOf) ? Array.prototype.indexOf : function (obj, fromIndex) {
  if (fromIndex === null || fromIndex === undefined) { fromIndex = 0; }
  else if (fromIndex < 0) { fromIndex = Math.max(0, this.length + fromIndex); }
  for (var i = fromIndex, j = this.length; i < j; i++) {
    if (this[i] === obj) { return i; }
  }
  return -1;
};

Ember.ArrayPolyfills = {
  map: arrayMap,
  forEach: arrayForEach,
  indexOf: arrayIndexOf
};

var utils = Ember.EnumerableUtils = {
  map: function(obj, callback, thisArg) {
    return obj.map ? obj.map.call(obj, callback, thisArg) : arrayMap.call(obj, callback, thisArg);
  },

  forEach: function(obj, callback, thisArg) {
    return obj.forEach ? obj.forEach.call(obj, callback, thisArg) : arrayForEach.call(obj, callback, thisArg);
  },

  indexOf: function(obj, element, index) {
    return obj.indexOf ? obj.indexOf.call(obj, element, index) : arrayIndexOf.call(obj, element, index);
  },

  indexesOf: function(obj, elements) {
    return elements === undefined ? [] : utils.map(elements, function(item) {
      return utils.indexOf(obj, item);
    });
  },

  removeObject: function(array, item) {
    var index = utils.indexOf(array, item);
    if (index !== -1) { array.splice(index, 1); }
  },

  replace: function(array, idx, amt, objects) {
    if (array.replace) {
      return array.replace(idx, amt, objects);
    } else {
      var args = Array.prototype.concat.apply([idx, amt], objects);
      return array.splice.apply(array, args);
    }
  }
};

if (Ember.SHIM_ES5) {
  if (!Array.prototype.map) {
    Array.prototype.map = arrayMap;
  }

  if (!Array.prototype.forEach) {
    Array.prototype.forEach = arrayForEach;
  }

  if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = arrayIndexOf;
  }
}

})();

(function() {
/*globals Node */
/**
@module ember-metal
*/

/**
  Platform specific methods and feature detectors needed by the framework.

  @class platform
  @namespace Ember
  @static
*/
var platform = Ember.platform = {};

/**
  Identical to Object.create().  Implements if not available natively.
  @method create
  @for Ember
*/
Ember.create = Object.create;

if (!Ember.create) {
  var K = function() {};

  Ember.create = function(obj, props) {
    K.prototype = obj;
    obj = new K();
    if (props) {
      K.prototype = obj;
      for (var prop in props) {
        K.prototype[prop] = props[prop].value;
      }
      obj = new K();
    }
    K.prototype = null;

    return obj;
  };

  Ember.create.isSimulated = true;
}

var defineProperty = Object.defineProperty;
var canRedefineProperties, canDefinePropertyOnDOM;

// Catch IE8 where Object.defineProperty exists but only works on DOM elements
if (defineProperty) {
  try {
    defineProperty({}, 'a',{get:function(){}});
  } catch (e) {
    defineProperty = null;
  }
}

if (defineProperty) {
  // Detects a bug in Android <3.2 where you cannot redefine a property using
  // Object.defineProperty once accessors have already been set.
  canRedefineProperties = (function() {
    var obj = {};

    defineProperty(obj, 'a', {
      configurable: true,
      enumerable: true,
      get: function() { },
      set: function() { }
    });

    defineProperty(obj, 'a', {
      configurable: true,
      enumerable: true,
      writable: true,
      value: true
    });

    return obj.a === true;
  })();

  // This is for Safari 5.0, which supports Object.defineProperty, but not
  // on DOM nodes.
  canDefinePropertyOnDOM = (function(){
    try {
      defineProperty(document.createElement('div'), 'definePropertyOnDOM', {});
      return true;
    } catch(e) { }

    return false;
  })();

  if (!canRedefineProperties) {
    defineProperty = null;
  } else if (!canDefinePropertyOnDOM) {
    defineProperty = function(obj, keyName, desc){
      var isNode;

      if (typeof Node === "object") {
        isNode = obj instanceof Node;
      } else {
        isNode = typeof obj === "object" && typeof obj.nodeType === "number" && typeof obj.nodeName === "string";
      }

      if (isNode) {
        // TODO: Should we have a warning here?
        return (obj[keyName] = desc.value);
      } else {
        return Object.defineProperty(obj, keyName, desc);
      }
    };
  }
}

/**
@class platform
@namespace Ember
*/

/**
  Identical to Object.defineProperty().  Implements as much functionality
  as possible if not available natively.

  @method defineProperty
  @param {Object} obj The object to modify
  @param {String} keyName property name to modify
  @param {Object} desc descriptor hash
  @return {void}
*/
platform.defineProperty = defineProperty;

/**
  Set to true if the platform supports native getters and setters.

  @property hasPropertyAccessors
  @final
*/
platform.hasPropertyAccessors = true;

if (!platform.defineProperty) {
  platform.hasPropertyAccessors = false;

  platform.defineProperty = function(obj, keyName, desc) {
    if (!desc.get) { obj[keyName] = desc.value; }
  };

  platform.defineProperty.isSimulated = true;
}

if (Ember.ENV.MANDATORY_SETTER && !platform.hasPropertyAccessors) {
  Ember.ENV.MANDATORY_SETTER = false;
}

})();

(function() {
/**
@module ember-metal
*/

var o_defineProperty = Ember.platform.defineProperty,
    o_create = Ember.create,
    // Used for guid generation...
    GUID_KEY = '__ember'+ (+ new Date()),
    uuid         = 0,
    numberCache  = [],
    stringCache  = {};

var MANDATORY_SETTER = Ember.ENV.MANDATORY_SETTER;

/**
  @private

  A unique key used to assign guids and other private metadata to objects.
  If you inspect an object in your browser debugger you will often see these.
  They can be safely ignored.

  On browsers that support it, these properties are added with enumeration
  disabled so they won't show up when you iterate over your properties.

  @property GUID_KEY
  @for Ember
  @type String
  @final
*/
Ember.GUID_KEY = GUID_KEY;

var GUID_DESC = {
  writable:    false,
  configurable: false,
  enumerable:  false,
  value: null
};

/**
  @private

  Generates a new guid, optionally saving the guid to the object that you
  pass in.  You will rarely need to use this method.  Instead you should
  call Ember.guidFor(obj), which return an existing guid if available.

  @method generateGuid
  @for Ember
  @param {Object} [obj] Object the guid will be used for.  If passed in, the guid will
    be saved on the object and reused whenever you pass the same object
    again.

    If no object is passed, just generate a new guid.

  @param {String} [prefix] Prefix to place in front of the guid.  Useful when you want to
    separate the guid into separate namespaces.

  @return {String} the guid
*/
Ember.generateGuid = function generateGuid(obj, prefix) {
  if (!prefix) prefix = 'ember';
  var ret = (prefix + (uuid++));
  if (obj) {
    GUID_DESC.value = ret;
    o_defineProperty(obj, GUID_KEY, GUID_DESC);
  }
  return ret ;
};

/**
  @private

  Returns a unique id for the object.  If the object does not yet have
  a guid, one will be assigned to it.  You can call this on any object,
  Ember.Object-based or not, but be aware that it will add a _guid property.

  You can also use this method on DOM Element objects.

  @method guidFor
  @for Ember
  @param obj {Object} any object, string, number, Element, or primitive
  @return {String} the unique guid for this instance.
*/
Ember.guidFor = function guidFor(obj) {

  // special cases where we don't want to add a key to object
  if (obj === undefined) return "(undefined)";
  if (obj === null) return "(null)";

  var cache, ret;
  var type = typeof obj;

  // Don't allow prototype changes to String etc. to change the guidFor
  switch(type) {
    case 'number':
      ret = numberCache[obj];
      if (!ret) ret = numberCache[obj] = 'nu'+obj;
      return ret;

    case 'string':
      ret = stringCache[obj];
      if (!ret) ret = stringCache[obj] = 'st'+(uuid++);
      return ret;

    case 'boolean':
      return obj ? '(true)' : '(false)';

    default:
      if (obj[GUID_KEY]) return obj[GUID_KEY];
      if (obj === Object) return '(Object)';
      if (obj === Array)  return '(Array)';
      ret = 'ember'+(uuid++);
      GUID_DESC.value = ret;
      o_defineProperty(obj, GUID_KEY, GUID_DESC);
      return ret;
  }
};

// ..........................................................
// META
//

var META_DESC = {
  writable:    true,
  configurable: false,
  enumerable:  false,
  value: null
};

var META_KEY = Ember.GUID_KEY+'_meta';

/**
  The key used to store meta information on object for property observing.

  @property META_KEY
  @for Ember
  @private
  @final
  @type String
*/
Ember.META_KEY = META_KEY;

// Placeholder for non-writable metas.
var EMPTY_META = {
  descs: {},
  watching: {}
};

if (MANDATORY_SETTER) { EMPTY_META.values = {}; }

Ember.EMPTY_META = EMPTY_META;

if (Object.freeze) Object.freeze(EMPTY_META);

var isDefinePropertySimulated = Ember.platform.defineProperty.isSimulated;

function Meta(obj) {
  this.descs = {};
  this.watching = {};
  this.cache = {};
  this.source = obj;
}

if (isDefinePropertySimulated) {
  // on platforms that don't support enumerable false
  // make meta fail jQuery.isPlainObject() to hide from
  // jQuery.extend() by having a property that fails
  // hasOwnProperty check.
  Meta.prototype.__preventPlainObject__ = true;
}

/**
  Retrieves the meta hash for an object.  If 'writable' is true ensures the
  hash is writable for this object as well.

  The meta object contains information about computed property descriptors as
  well as any watched properties and other information.  You generally will
  not access this information directly but instead work with higher level
  methods that manipulate this hash indirectly.

  @method meta
  @for Ember
  @private

  @param {Object} obj The object to retrieve meta for

  @param {Boolean} [writable=true] Pass false if you do not intend to modify
    the meta hash, allowing the method to avoid making an unnecessary copy.

  @return {Hash}
*/
Ember.meta = function meta(obj, writable) {

  var ret = obj[META_KEY];
  if (writable===false) return ret || EMPTY_META;

  if (!ret) {
    if (!isDefinePropertySimulated) o_defineProperty(obj, META_KEY, META_DESC);

    ret = new Meta(obj);

    if (MANDATORY_SETTER) { ret.values = {}; }

    obj[META_KEY] = ret;

    // make sure we don't accidentally try to create constructor like desc
    ret.descs.constructor = null;

  } else if (ret.source !== obj) {
    if (!isDefinePropertySimulated) o_defineProperty(obj, META_KEY, META_DESC);

    ret = o_create(ret);
    ret.descs    = o_create(ret.descs);
    ret.watching = o_create(ret.watching);
    ret.cache    = {};
    ret.source   = obj;

    if (MANDATORY_SETTER) { ret.values = o_create(ret.values); }

    obj[META_KEY] = ret;
  }
  return ret;
};

Ember.getMeta = function getMeta(obj, property) {
  var meta = Ember.meta(obj, false);
  return meta[property];
};

Ember.setMeta = function setMeta(obj, property, value) {
  var meta = Ember.meta(obj, true);
  meta[property] = value;
  return value;
};

/**
  @private

  In order to store defaults for a class, a prototype may need to create
  a default meta object, which will be inherited by any objects instantiated
  from the class's constructor.

  However, the properties of that meta object are only shallow-cloned,
  so if a property is a hash (like the event system's `listeners` hash),
  it will by default be shared across all instances of that class.

  This method allows extensions to deeply clone a series of nested hashes or
  other complex objects. For instance, the event system might pass
  ['listeners', 'foo:change', 'ember157'] to `prepareMetaPath`, which will
  walk down the keys provided.

  For each key, if the key does not exist, it is created. If it already
  exists and it was inherited from its constructor, the constructor's
  key is cloned.

  You can also pass false for `writable`, which will simply return
  undefined if `prepareMetaPath` discovers any part of the path that
  shared or undefined.

  @method metaPath
  @for Ember
  @param {Object} obj The object whose meta we are examining
  @param {Array} path An array of keys to walk down
  @param {Boolean} writable whether or not to create a new meta
    (or meta property) if one does not already exist or if it's
    shared with its constructor
*/
Ember.metaPath = function metaPath(obj, path, writable) {
  var meta = Ember.meta(obj, writable), keyName, value;

  for (var i=0, l=path.length; i<l; i++) {
    keyName = path[i];
    value = meta[keyName];

    if (!value) {
      if (!writable) { return undefined; }
      value = meta[keyName] = { __ember_source__: obj };
    } else if (value.__ember_source__ !== obj) {
      if (!writable) { return undefined; }
      value = meta[keyName] = o_create(value);
      value.__ember_source__ = obj;
    }

    meta = value;
  }

  return value;
};

/**
  @private

  Wraps the passed function so that `this._super` will point to the superFunc
  when the function is invoked.  This is the primitive we use to implement
  calls to super.

  @method wrap
  @for Ember
  @param {Function} func The function to call
  @param {Function} superFunc The super function.
  @return {Function} wrapped function.
*/
Ember.wrap = function(func, superFunc) {

  function K() {}

  var newFunc = function() {
    var ret, sup = this._super;
    this._super = superFunc || K;
    ret = func.apply(this, arguments);
    this._super = sup;
    return ret;
  };

  newFunc.base = func;
  return newFunc;
};

/**
  Returns true if the passed object is an array or Array-like.

  Ember Array Protocol:

    - the object has an objectAt property
    - the object is a native Array
    - the object is an Object, and has a length property

  Unlike Ember.typeOf this method returns true even if the passed object is
  not formally array but appears to be array-like (i.e. implements Ember.Array)

      Ember.isArray(); // false
      Ember.isArray([]); // true
      Ember.isArray( Ember.ArrayProxy.create({ content: [] }) ); // true

  @method isArray
  @for Ember
  @param {Object} obj The object to test
  @return {Boolean}
*/
Ember.isArray = function(obj) {
  if (!obj || obj.setInterval) { return false; }
  if (Array.isArray && Array.isArray(obj)) { return true; }
  if (Ember.Array && Ember.Array.detect(obj)) { return true; }
  if ((obj.length !== undefined) && 'object'===typeof obj) { return true; }
  return false;
};

/**
  Forces the passed object to be part of an array.  If the object is already
  an array or array-like, returns the object.  Otherwise adds the object to
  an array.  If obj is null or undefined, returns an empty array.

      Ember.makeArray();          => []
      Ember.makeArray(null);      => []
      Ember.makeArray(undefined); => []
      Ember.makeArray('lindsay'); => ['lindsay']
      Ember.makeArray([1,2,42]);  => [1,2,42]

      var controller = Ember.ArrayProxy.create({ content: [] });
      Ember.makeArray(controller) === controller;   => true

  @method makeArray
  @for Ember
  @param {Object} obj the object
  @return {Array}
*/
Ember.makeArray = function(obj) {
  if (obj === null || obj === undefined) { return []; }
  return Ember.isArray(obj) ? obj : [obj];
};

function canInvoke(obj, methodName) {
  return !!(obj && typeof obj[methodName] === 'function');
}

/**
  Checks to see if the `methodName` exists on the `obj`.

  @method canInvoke
  @for Ember
  @param {Object} obj The object to check for the method
  @param {String} methodName The method name to check for
*/
Ember.canInvoke = canInvoke;

/**
  Checks to see if the `methodName` exists on the `obj`,
  and if it does, invokes it with the arguments passed.

  @method tryInvoke
  @for Ember
  @param {Object} obj The object to check for the method
  @param {String} methodName The method name to check for
  @param {Array} [args] The arguments to pass to the method
  @return {anything} the return value of the invoked method or undefined if it cannot be invoked
*/
Ember.tryInvoke = function(obj, methodName, args) {
  if (canInvoke(obj, methodName)) {
    return obj[methodName].apply(obj, args || []);
  }
};

})();

(function() {
/**
@module ember-metal
*/

/*
  JavaScript (before ES6) does not have a Map implementation. Objects,
  which are often used as dictionaries, may only have Strings as keys.

  Because Ember has a way to get a unique identifier for every object
  via `Ember.guidFor`, we can implement a performant Map with arbitrary
  keys. Because it is commonly used in low-level bookkeeping, Map is
  implemented as a pure JavaScript object for performance.

  This implementation follows the current iteration of the ES6 proposal
  for maps (http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets),
  with two exceptions. First, because we need our implementation to be
  pleasant on older browsers, we do not use the `delete` name (using
  `remove` instead). Second, as we do not have the luxury of in-VM
  iteration, we implement a forEach method for iteration.

  Map is mocked out to look like an Ember object, so you can do
  `Ember.Map.create()` for symmetry with other Ember classes.
*/
var guidFor = Ember.guidFor,
    indexOf = Ember.ArrayPolyfills.indexOf;

var copy = function(obj) {
  var output = {};

  for (var prop in obj) {
    if (obj.hasOwnProperty(prop)) { output[prop] = obj[prop]; }
  }

  return output;
};

var copyMap = function(original, newObject) {
  var keys = original.keys.copy(),
      values = copy(original.values);

  newObject.keys = keys;
  newObject.values = values;

  return newObject;
};

/**
  This class is used internally by Ember.js and Ember Data.
  Please do not use it at this time. We plan to clean it up
  and add many tests soon.

  @class OrderedSet
  @namespace Ember
  @constructor
  @private
*/
var OrderedSet = Ember.OrderedSet = function() {
  this.clear();
};

/**
  @method create
  @static
  @return {Ember.OrderedSet}
*/
OrderedSet.create = function() {
  return new OrderedSet();
};

OrderedSet.prototype = {
  /**
    @method clear
  */
  clear: function() {
    this.presenceSet = {};
    this.list = [];
  },

  /**
    @method add
    @param obj
  */
  add: function(obj) {
    var guid = guidFor(obj),
        presenceSet = this.presenceSet,
        list = this.list;

    if (guid in presenceSet) { return; }

    presenceSet[guid] = true;
    list.push(obj);
  },

  /**
    @method remove
    @param obj
  */
  remove: function(obj) {
    var guid = guidFor(obj),
        presenceSet = this.presenceSet,
        list = this.list;

    delete presenceSet[guid];

    var index = indexOf.call(list, obj);
    if (index > -1) {
      list.splice(index, 1);
    }
  },

  /**
    @method isEmpty
    @return {Boolean}
  */
  isEmpty: function() {
    return this.list.length === 0;
  },

  /**
    @method has
    @param obj
    @return {Boolean}
  */
  has: function(obj) {
    var guid = guidFor(obj),
        presenceSet = this.presenceSet;

    return guid in presenceSet;
  },

  /**
    @method forEach
    @param {Function} function
    @param target
  */
  forEach: function(fn, self) {
    // allow mutation during iteration
    var list = this.list.slice();

    for (var i = 0, j = list.length; i < j; i++) {
      fn.call(self, list[i]);
    }
  },

  /**
    @method toArray
    @return {Array}
  */
  toArray: function() {
    return this.list.slice();
  },

  /**
    @method copy
    @return {Ember.OrderedSet}
  */
  copy: function() {
    var set = new OrderedSet();

    set.presenceSet = copy(this.presenceSet);
    set.list = this.list.slice();

    return set;
  }
};

/**
  A Map stores values indexed by keys. Unlike JavaScript's
  default Objects, the keys of a Map can be any JavaScript
  object.

  Internally, a Map has two data structures:

    `keys`: an OrderedSet of all of the existing keys
    `values`: a JavaScript Object indexed by the
      Ember.guidFor(key)

  When a key/value pair is added for the first time, we
  add the key to the `keys` OrderedSet, and create or
  replace an entry in `values`. When an entry is deleted,
  we delete its entry in `keys` and `values`.

  @class Map
  @namespace Ember
  @private
  @constructor
*/
var Map = Ember.Map = function() {
  this.keys = Ember.OrderedSet.create();
  this.values = {};
};

/**
  @method create
  @static
*/
Map.create = function() {
  return new Map();
};

Map.prototype = {
  /**
    Retrieve the value associated with a given key.

    @method get
    @param {anything} key
    @return {anything} the value associated with the key, or undefined
  */
  get: function(key) {
    var values = this.values,
        guid = guidFor(key);

    return values[guid];
  },

  /**
    Adds a value to the map. If a value for the given key has already been
    provided, the new value will replace the old value.

    @method set
    @param {anything} key
    @param {anything} value
  */
  set: function(key, value) {
    var keys = this.keys,
        values = this.values,
        guid = guidFor(key);

    keys.add(key);
    values[guid] = value;
  },

  /**
    Removes a value from the map for an associated key.

    @method remove
    @param {anything} key
    @return {Boolean} true if an item was removed, false otherwise
  */
  remove: function(key) {
    // don't use ES6 "delete" because it will be annoying
    // to use in browsers that are not ES6 friendly;
    var keys = this.keys,
        values = this.values,
        guid = guidFor(key),
        value;

    if (values.hasOwnProperty(guid)) {
      keys.remove(key);
      value = values[guid];
      delete values[guid];
      return true;
    } else {
      return false;
    }
  },

  /**
    Check whether a key is present.

    @method has
    @param {anything} key
    @return {Boolean} true if the item was present, false otherwise
  */
  has: function(key) {
    var values = this.values,
        guid = guidFor(key);

    return values.hasOwnProperty(guid);
  },

  /**
    Iterate over all the keys and values. Calls the function once
    for each key, passing in the key and value, in that order.

    The keys are guaranteed to be iterated over in insertion order.

    @method forEach
    @param {Function} callback
    @param {anything} self if passed, the `this` value inside the
      callback. By default, `this` is the map.
  */
  forEach: function(callback, self) {
    var keys = this.keys,
        values = this.values;

    keys.forEach(function(key) {
      var guid = guidFor(key);
      callback.call(self, key, values[guid]);
    });
  },

  /**
    @method copy
    @return {Ember.Map}
  */
  copy: function() {
    return copyMap(this, new Map());
  }
};

/**
  @class MapWithDefault
  @namespace Ember
  @extends Ember.Map
  @private
  @constructor
  @param [options]
    @param {anything} [options.defaultValue]
*/
var MapWithDefault = Ember.MapWithDefault = function(options) {
  Map.call(this);
  this.defaultValue = options.defaultValue;
};

/**
  @method create
  @static
  @param [options]
    @param {anything} [options.defaultValue]
  @return {Ember.MapWithDefault|Ember.Map} If options are passed, returns Ember.MapWithDefault otherwise returns Ember.Map
*/
MapWithDefault.create = function(options) {
  if (options) {
    return new MapWithDefault(options);
  } else {
    return new Map();
  }
};

MapWithDefault.prototype = Ember.create(Map.prototype);

/**
  Retrieve the value associated with a given key.

  @method get
  @param {anything} key
  @return {anything} the value associated with the key, or the default value
*/
MapWithDefault.prototype.get = function(key) {
  var hasValue = this.has(key);

  if (hasValue) {
    return Map.prototype.get.call(this, key);
  } else {
    var defaultValue = this.defaultValue(key);
    this.set(key, defaultValue);
    return defaultValue;
  }
};

/**
  @method copy
  @return {Ember.MapWithDefault}
*/
MapWithDefault.prototype.copy = function() {
  return copyMap(this, new MapWithDefault({
    defaultValue: this.defaultValue
  }));
};

})();

(function() {
/**
@module ember-metal
*/

var META_KEY = Ember.META_KEY, get, set;

var MANDATORY_SETTER = Ember.ENV.MANDATORY_SETTER;

var IS_GLOBAL = /^([A-Z$]|([0-9][A-Z$]))/;
var IS_GLOBAL_PATH = /^([A-Z$]|([0-9][A-Z$])).*[\.\*]/;
var HAS_THIS  = /^this[\.\*]/;
var FIRST_KEY = /^([^\.\*]+)/;

// ..........................................................
// GET AND SET
//
// If we are on a platform that supports accessors we can get use those.
// Otherwise simulate accessors by looking up the property directly on the
// object.

/**
  Gets the value of a property on an object.  If the property is computed,
  the function will be invoked.  If the property is not defined but the
  object implements the unknownProperty() method then that will be invoked.

  If you plan to run on IE8 and older browsers then you should use this
  method anytime you want to retrieve a property on an object that you don't
  know for sure is private.  (My convention only properties beginning with
  an underscore '_' are considered private.)

  On all newer browsers, you only need to use this method to retrieve
  properties if the property might not be defined on the object and you want
  to respect the unknownProperty() handler.  Otherwise you can ignore this
  method.

  Note that if the obj itself is null, this method will simply return
  undefined.

  @method get
  @for Ember
  @param {Object} obj The object to retrieve from.
  @param {String} keyName The property key to retrieve
  @return {Object} the property value or null.
*/
get = function get(obj, keyName) {
  // Helpers that operate with 'this' within an #each
  if (keyName === '') {
    return obj;
  }

  if (!keyName && 'string'===typeof obj) {
    keyName = obj;
    obj = null;
  }

  if (!obj || keyName.indexOf('.') !== -1) {
    return getPath(obj, keyName);
  }

  Ember.assert("You need to provide an object and key to `get`.", !!obj && keyName);

  var meta = obj[META_KEY], desc = meta && meta.descs[keyName], ret;
  if (desc) {
    return desc.get(obj, keyName);
  } else {
    if (MANDATORY_SETTER && meta && meta.watching[keyName] > 0) {
      ret = meta.values[keyName];
    } else {
      ret = obj[keyName];
    }

    if (ret === undefined &&
        'object' === typeof obj && !(keyName in obj) && 'function' === typeof obj.unknownProperty) {
      return obj.unknownProperty(keyName);
    }

    return ret;
  }
};

/**
  Sets the value of a property on an object, respecting computed properties
  and notifying observers and other listeners of the change.  If the
  property is not defined but the object implements the unknownProperty()
  method then that will be invoked as well.

  If you plan to run on IE8 and older browsers then you should use this
  method anytime you want to set a property on an object that you don't
  know for sure is private.  (My convention only properties beginning with
  an underscore '_' are considered private.)

  On all newer browsers, you only need to use this method to set
  properties if the property might not be defined on the object and you want
  to respect the unknownProperty() handler.  Otherwise you can ignore this
  method.

  @method set
  @for Ember
  @param {Object} obj The object to modify.
  @param {String} keyName The property key to set
  @param {Object} value The value to set
  @return {Object} the passed value.
*/
set = function set(obj, keyName, value, tolerant) {
  if (typeof obj === 'string') {
    Ember.assert("Path '" + obj + "' must be global if no obj is given.", IS_GLOBAL.test(obj));
    value = keyName;
    keyName = obj;
    obj = null;
  }

  if (!obj || keyName.indexOf('.') !== -1) {
    return setPath(obj, keyName, value, tolerant);
  }

  Ember.assert("You need to provide an object and key to `set`.", !!obj && keyName !== undefined);
  Ember.assert('calling set on destroyed object', !obj.isDestroyed);

  var meta = obj[META_KEY], desc = meta && meta.descs[keyName],
      isUnknown, currentValue;
  if (desc) {
    desc.set(obj, keyName, value);
  }
  else {
    isUnknown = 'object' === typeof obj && !(keyName in obj);

    // setUnknownProperty is called if `obj` is an object,
    // the property does not already exist, and the
    // `setUnknownProperty` method exists on the object
    if (isUnknown && 'function' === typeof obj.setUnknownProperty) {
      obj.setUnknownProperty(keyName, value);
    } else if (meta && meta.watching[keyName] > 0) {
      if (MANDATORY_SETTER) {
        currentValue = meta.values[keyName];
      } else {
        currentValue = obj[keyName];
      }
      // only trigger a change if the value has changed
      if (value !== currentValue) {
        Ember.propertyWillChange(obj, keyName);
        if (MANDATORY_SETTER) {
          if (currentValue === undefined && !(keyName in obj)) {
            Ember.defineProperty(obj, keyName, null, value); // setup mandatory setter
          } else {
            meta.values[keyName] = value;
          }
        } else {
          obj[keyName] = value;
        }
        Ember.propertyDidChange(obj, keyName);
      }
    } else {
      obj[keyName] = value;
    }
  }
  return value;
};

// Currently used only by Ember Data tests
if (Ember.config.overrideAccessors) {
  Ember.config.overrideAccessors();
  get = Ember.get;
  set = Ember.set;
}

function firstKey(path) {
  return path.match(FIRST_KEY)[0];
}

// assumes path is already normalized
function normalizeTuple(target, path) {
  var hasThis  = HAS_THIS.test(path),
      isGlobal = !hasThis && IS_GLOBAL_PATH.test(path),
      key;

  if (!target || isGlobal) target = Ember.lookup;
  if (hasThis) path = path.slice(5);

  if (target === Ember.lookup) {
    key = firstKey(path);
    target = get(target, key);
    path   = path.slice(key.length+1);
  }

  // must return some kind of path to be valid else other things will break.
  if (!path || path.length===0) throw new Error('Invalid Path');

  return [ target, path ];
}

function getPath(root, path) {
  var hasThis, parts, tuple, idx, len;

  // If there is no root and path is a key name, return that
  // property from the global object.
  // E.g. get('Ember') -> Ember
  if (root === null && path.indexOf('.') === -1) { return get(Ember.lookup, path); }

  // detect complicated paths and normalize them
  hasThis  = HAS_THIS.test(path);

  if (!root || hasThis) {
    tuple = normalizeTuple(root, path);
    root = tuple[0];
    path = tuple[1];
    tuple.length = 0;
  }

  parts = path.split(".");
  len = parts.length;
  for (idx=0; root && idx<len; idx++) {
    root = get(root, parts[idx], true);
    if (root && root.isDestroyed) { return undefined; }
  }
  return root;
}

function setPath(root, path, value, tolerant) {
  var keyName;

  // get the last part of the path
  keyName = path.slice(path.lastIndexOf('.') + 1);

  // get the first part of the part
  path    = path.slice(0, path.length-(keyName.length+1));

  // unless the path is this, look up the first part to
  // get the root
  if (path !== 'this') {
    root = getPath(root, path);
  }

  if (!keyName || keyName.length === 0) {
    throw new Error('You passed an empty path');
  }

  if (!root) {
    if (tolerant) { return; }
    else { throw new Error('Object in path '+path+' could not be found or was destroyed.'); }
  }

  return set(root, keyName, value);
}

/**
  @private

  Normalizes a target/path pair to reflect that actual target/path that should
  be observed, etc.  This takes into account passing in global property
  paths (i.e. a path beginning with a captial letter not defined on the
  target) and * separators.

  @method normalizeTuple
  @for Ember
  @param {Object} target The current target.  May be null.
  @param {String} path A path on the target or a global property path.
  @return {Array} a temporary array with the normalized target/path pair.
*/
Ember.normalizeTuple = function(target, path) {
  return normalizeTuple(target, path);
};

Ember.getWithDefault = function(root, key, defaultValue) {
  var value = get(root, key);

  if (value === undefined) { return defaultValue; }
  return value;
};

Ember.get = get;
Ember.getPath = Ember.deprecateFunc('getPath is deprecated since get now supports paths', Ember.get);

Ember.set = set;
Ember.setPath = Ember.deprecateFunc('setPath is deprecated since set now supports paths', Ember.set);

/**
  Error-tolerant form of Ember.set. Will not blow up if any part of the
  chain is undefined, null, or destroyed.

  This is primarily used when syncing bindings, which may try to update after
  an object has been destroyed.

  @method trySet
  @for Ember
  @param {Object} obj The object to modify.
  @param {String} keyName The property key to set
  @param {Object} value The value to set
*/
Ember.trySet = function(root, path, value) {
  return set(root, path, value, true);
};
Ember.trySetPath = Ember.deprecateFunc('trySetPath has been renamed to trySet', Ember.trySet);

/**
  Returns true if the provided path is global (e.g., "MyApp.fooController.bar")
  instead of local ("foo.bar.baz").

  @method isGlobalPath
  @for Ember
  @private
  @param {String} path
  @return Boolean
*/
Ember.isGlobalPath = function(path) {
  return IS_GLOBAL.test(path);
};

})();

(function() {
/**
@module ember-metal
*/

var GUID_KEY = Ember.GUID_KEY,
    META_KEY = Ember.META_KEY,
    EMPTY_META = Ember.EMPTY_META,
    metaFor = Ember.meta,
    o_create = Ember.create,
    objectDefineProperty = Ember.platform.defineProperty;

var MANDATORY_SETTER = Ember.ENV.MANDATORY_SETTER;

// ..........................................................
// DESCRIPTOR
//

/**
  Objects of this type can implement an interface to responds requests to
  get and set.  The default implementation handles simple properties.

  You generally won't need to create or subclass this directly.

  @class Descriptor
  @namespace Ember
  @private
  @constructor
*/
var Descriptor = Ember.Descriptor = function() {};

// ..........................................................
// DEFINING PROPERTIES API
//

/**
  @private

  NOTE: This is a low-level method used by other parts of the API.  You almost
  never want to call this method directly.  Instead you should use Ember.mixin()
  to define new properties.

  Defines a property on an object.  This method works much like the ES5
  Object.defineProperty() method except that it can also accept computed
  properties and other special descriptors.

  Normally this method takes only three parameters.  However if you pass an
  instance of Ember.Descriptor as the third param then you can pass an optional
  value as the fourth parameter.  This is often more efficient than creating
  new descriptor hashes for each property.

  ## Examples

      // ES5 compatible mode
      Ember.defineProperty(contact, 'firstName', {
        writable: true,
        configurable: false,
        enumerable: true,
        value: 'Charles'
      });

      // define a simple property
      Ember.defineProperty(contact, 'lastName', undefined, 'Jolley');

      // define a computed property
      Ember.defineProperty(contact, 'fullName', Ember.computed(function() {
        return this.firstName+' '+this.lastName;
      }).property('firstName', 'lastName').cacheable());

  @method defineProperty
  @for Ember
  @param {Object} obj the object to define this property on. This may be a prototype.
  @param {String} keyName the name of the property
  @param {Ember.Descriptor} [desc] an instance of Ember.Descriptor (typically a
    computed property) or an ES5 descriptor.
    You must provide this or `data` but not both.
  @param {anything} [data] something other than a descriptor, that will
    become the explicit value of this property.
*/
Ember.defineProperty = function(obj, keyName, desc, data, meta) {
  var descs, existingDesc, watching, value;

  if (!meta) meta = metaFor(obj);
  descs = meta.descs;
  existingDesc = meta.descs[keyName];
  watching = meta.watching[keyName] > 0;

  if (existingDesc instanceof Ember.Descriptor) {
    existingDesc.teardown(obj, keyName);
  }

  if (desc instanceof Ember.Descriptor) {
    value = desc;

    descs[keyName] = desc;
    if (MANDATORY_SETTER && watching) {
      objectDefineProperty(obj, keyName, {
        configurable: true,
        enumerable: true,
        writable: true,
        value: undefined // make enumerable
      });
    } else {
      obj[keyName] = undefined; // make enumerable
    }
    desc.setup(obj, keyName);
  } else {
    descs[keyName] = undefined; // shadow descriptor in proto
    if (desc == null) {
      value = data;

      if (MANDATORY_SETTER && watching) {
        meta.values[keyName] = data;
        objectDefineProperty(obj, keyName, {
          configurable: true,
          enumerable: true,
          set: function() {
            Ember.assert('Must use Ember.set() to access this property', false);
          },
          get: function() {
            var meta = this[META_KEY];
            return meta && meta.values[keyName];
          }
        });
      } else {
        obj[keyName] = data;
      }
    } else {
      value = desc;

      // compatibility with ES5
      objectDefineProperty(obj, keyName, desc);
    }
  }

  // if key is being watched, override chains that
  // were initialized with the prototype
  if (watching) { Ember.overrideChains(obj, keyName, meta); }

  // The `value` passed to the `didDefineProperty` hook is
  // either the descriptor or data, whichever was passed.
  if (obj.didDefineProperty) { obj.didDefineProperty(obj, keyName, value); }

  return this;
};

})();

(function() {
/**
@module ember-metal
*/

var AFTER_OBSERVERS = ':change';
var BEFORE_OBSERVERS = ':before';
var guidFor = Ember.guidFor;

var deferred = 0;
var array_Slice = [].slice;

var ObserverSet = function () {
  this.targetSet = {};
};
ObserverSet.prototype.add = function (target, path) {
  var targetSet = this.targetSet,
    targetGuid = Ember.guidFor(target),
    pathSet = targetSet[targetGuid];
  if (!pathSet) {
    targetSet[targetGuid] = pathSet = {};
  }
  if (pathSet[path]) {
    return false;
  } else {
    return pathSet[path] = true;
  }
};
ObserverSet.prototype.clear = function () {
  this.targetSet = {};
};

var DeferredEventQueue = function() {
  this.targetSet = {};
  this.queue = [];
};

DeferredEventQueue.prototype.push = function(target, eventName, keyName) {
  var targetSet = this.targetSet,
    queue = this.queue,
    targetGuid = Ember.guidFor(target),
    eventNameSet = targetSet[targetGuid],
    index;

  if (!eventNameSet) {
    targetSet[targetGuid] = eventNameSet = {};
  }
  index = eventNameSet[eventName];
  if (index === undefined) {
    eventNameSet[eventName] = queue.push(Ember.deferEvent(target, eventName, [target, keyName])) - 1;
  } else {
    queue[index] = Ember.deferEvent(target, eventName, [target, keyName]);
  }
};

DeferredEventQueue.prototype.flush = function() {
  var queue = this.queue;
  this.queue = [];
  this.targetSet = {};
  for (var i=0, len=queue.length; i < len; ++i) {
    queue[i]();
  }
};

var queue = new DeferredEventQueue(), beforeObserverSet = new ObserverSet();

function notifyObservers(obj, eventName, keyName, forceNotification) {
  if (deferred && !forceNotification) {
    queue.push(obj, eventName, keyName);
  } else {
    Ember.sendEvent(obj, eventName, [obj, keyName]);
  }
}

function flushObserverQueue() {
  beforeObserverSet.clear();

  queue.flush();
}

/**
  @method beginPropertyChanges
  @chainable
*/
Ember.beginPropertyChanges = function() {
  deferred++;
  return this;
};

/**
  @method endPropertyChanges
*/
Ember.endPropertyChanges = function() {
  deferred--;
  if (deferred<=0) flushObserverQueue();
};

/**
  Make a series of property changes together in an
  exception-safe way.

      Ember.changeProperties(function() {
        obj1.set('foo', mayBlowUpWhenSet);
        obj2.set('bar', baz);
      });

  @method changeProperties
  @param {Function} callback
  @param [binding]
*/
Ember.changeProperties = function(cb, binding){
  Ember.beginPropertyChanges();
  try {
    cb.call(binding);
  } finally {
    Ember.endPropertyChanges();
  }
};

/**
  Set a list of properties on an object. These properties are set inside
  a single `beginPropertyChanges` and `endPropertyChanges` batch, so
  observers will be buffered.

  @method setProperties
  @param target
  @param {Hash} properties
  @return target
*/
Ember.setProperties = function(self, hash) {
  Ember.changeProperties(function(){
    for(var prop in hash) {
      if (hash.hasOwnProperty(prop)) Ember.set(self, prop, hash[prop]);
    }
  });
  return self;
};

function changeEvent(keyName) {
  return keyName+AFTER_OBSERVERS;
}

function beforeEvent(keyName) {
  return keyName+BEFORE_OBSERVERS;
}

/**
  @method addObserver
  @param obj
  @param {String} path
  @param {Object|Function} targetOrMethod
  @param {Function|String} [method]
*/
Ember.addObserver = function(obj, path, target, method) {
  Ember.addListener(obj, changeEvent(path), target, method);
  Ember.watch(obj, path);
  return this;
};

Ember.observersFor = function(obj, path) {
  return Ember.listenersFor(obj, changeEvent(path));
};

/**
  @method removeObserver
  @param obj
  @param {String} path
  @param {Object|Function} targetOrMethod
  @param {Function|String} [method]
*/
Ember.removeObserver = function(obj, path, target, method) {
  Ember.unwatch(obj, path);
  Ember.removeListener(obj, changeEvent(path), target, method);
  return this;
};

/**
  @method addBeforeObserver
  @param obj
  @param {String} path
  @param {Object|Function} targetOrMethod
  @param {Function|String} [method]
*/
Ember.addBeforeObserver = function(obj, path, target, method) {
  Ember.addListener(obj, beforeEvent(path), target, method);
  Ember.watch(obj, path);
  return this;
};

// Suspend observer during callback.
//
// This should only be used by the target of the observer
// while it is setting the observed path.
Ember._suspendBeforeObserver = function(obj, path, target, method, callback) {
  return Ember._suspendListener(obj, beforeEvent(path), target, method, callback);
};

Ember._suspendObserver = function(obj, path, target, method, callback) {
  return Ember._suspendListener(obj, changeEvent(path), target, method, callback);
};

var map = Ember.ArrayPolyfills.map;

Ember._suspendBeforeObservers = function(obj, paths, target, method, callback) {
  var events = map.call(paths, beforeEvent);
  return Ember._suspendListeners(obj, events, target, method, callback);
};

Ember._suspendObservers = function(obj, paths, target, method, callback) {
  var events = map.call(paths, changeEvent);
  return Ember._suspendListeners(obj, events, target, method, callback);
};

Ember.beforeObserversFor = function(obj, path) {
  return Ember.listenersFor(obj, beforeEvent(path));
};

/**
  @method removeBeforeObserver
  @param obj
  @param {String} path
  @param {Object|Function} targetOrMethod
  @param {Function|String} [method]
*/
Ember.removeBeforeObserver = function(obj, path, target, method) {
  Ember.unwatch(obj, path);
  Ember.removeListener(obj, beforeEvent(path), target, method);
  return this;
};

Ember.notifyObservers = function(obj, keyName) {
  if (obj.isDestroying) { return; }

  notifyObservers(obj, changeEvent(keyName), keyName);
};

Ember.notifyBeforeObservers = function(obj, keyName) {
  if (obj.isDestroying) { return; }

  var guid, set, forceNotification = false;

  if (deferred) {
    if (beforeObserverSet.add(obj, keyName)) {
      forceNotification = true;
    } else {
      return;
    }
  }

  notifyObservers(obj, beforeEvent(keyName), keyName, forceNotification);
};

})();

(function() {
/**
@module ember-metal
*/

var guidFor = Ember.guidFor, // utils.js
    metaFor = Ember.meta, // utils.js
    get = Ember.get, // accessors.js
    set = Ember.set, // accessors.js
    normalizeTuple = Ember.normalizeTuple, // accessors.js
    GUID_KEY = Ember.GUID_KEY, // utils.js
    META_KEY = Ember.META_KEY, // utils.js
    // circular reference observer depends on Ember.watch
    // we should move change events to this file or its own property_events.js
    notifyObservers = Ember.notifyObservers, // observer.js
    forEach = Ember.ArrayPolyfills.forEach, // array.js
    FIRST_KEY = /^([^\.\*]+)/,
    IS_PATH = /[\.\*]/;

var MANDATORY_SETTER = Ember.ENV.MANDATORY_SETTER,
o_defineProperty = Ember.platform.defineProperty;

function firstKey(path) {
  return path.match(FIRST_KEY)[0];
}

// returns true if the passed path is just a keyName
function isKeyName(path) {
  return path==='*' || !IS_PATH.test(path);
}

// ..........................................................
// DEPENDENT KEYS
//

var DEP_SKIP = { __emberproto__: true }; // skip some keys and toString

function iterDeps(method, obj, depKey, seen, meta) {

  var guid = guidFor(obj);
  if (!seen[guid]) seen[guid] = {};
  if (seen[guid][depKey]) return;
  seen[guid][depKey] = true;

  var deps = meta.deps;
  deps = deps && deps[depKey];
  if (deps) {
    for(var key in deps) {
      if (DEP_SKIP[key]) continue;
      var desc = meta.descs[key];
      if (desc && desc._suspended === obj) continue;
      method(obj, key);
    }
  }
}

var WILL_SEEN, DID_SEEN;

// called whenever a property is about to change to clear the cache of any dependent keys (and notify those properties of changes, etc...)
function dependentKeysWillChange(obj, depKey, meta) {
  if (obj.isDestroying) { return; }

  var seen = WILL_SEEN, top = !seen;
  if (top) { seen = WILL_SEEN = {}; }
  iterDeps(propertyWillChange, obj, depKey, seen, meta);
  if (top) { WILL_SEEN = null; }
}

// called whenever a property has just changed to update dependent keys
function dependentKeysDidChange(obj, depKey, meta) {
  if (obj.isDestroying) { return; }

  var seen = DID_SEEN, top = !seen;
  if (top) { seen = DID_SEEN = {}; }
  iterDeps(propertyDidChange, obj, depKey, seen, meta);
  if (top) { DID_SEEN = null; }
}

// ..........................................................
// CHAIN
//

function addChainWatcher(obj, keyName, node) {
  if (!obj || ('object' !== typeof obj)) return; // nothing to do
  var m = metaFor(obj);
  var nodes = m.chainWatchers;
  if (!nodes || nodes.__emberproto__ !== obj) {
    nodes = m.chainWatchers = { __emberproto__: obj };
  }

  if (!nodes[keyName]) { nodes[keyName] = {}; }
  nodes[keyName][guidFor(node)] = node;
  Ember.watch(obj, keyName);
}

function removeChainWatcher(obj, keyName, node) {
  if (!obj || 'object' !== typeof obj) { return; } // nothing to do
  var m = metaFor(obj, false),
      nodes = m.chainWatchers;
  if (!nodes || nodes.__emberproto__ !== obj) { return; } //nothing to do
  if (nodes[keyName]) { delete nodes[keyName][guidFor(node)]; }
  Ember.unwatch(obj, keyName);
}

var pendingQueue = [];

// attempts to add the pendingQueue chains again.  If some of them end up
// back in the queue and reschedule is true, schedules a timeout to try
// again.
function flushPendingChains() {
  if (pendingQueue.length === 0) { return; } // nothing to do

  var queue = pendingQueue;
  pendingQueue = [];

  forEach.call(queue, function(q) { q[0].add(q[1]); });

  Ember.warn('Watching an undefined global, Ember expects watched globals to be setup by the time the run loop is flushed, check for typos', pendingQueue.length === 0);
}

function isProto(pvalue) {
  return metaFor(pvalue, false).proto === pvalue;
}

// A ChainNode watches a single key on an object.  If you provide a starting
// value for the key then the node won't actually watch it.  For a root node
// pass null for parent and key and object for value.
var ChainNode = function(parent, key, value, separator) {
  var obj;
  this._parent = parent;
  this._key    = key;

  // _watching is true when calling get(this._parent, this._key) will
  // return the value of this node.
  //
  // It is false for the root of a chain (because we have no parent)
  // and for global paths (because the parent node is the object with
  // the observer on it)
  this._watching = value===undefined;

  this._value  = value;
  this._separator = separator || '.';
  this._paths = {};
  if (this._watching) {
    this._object = parent.value();
    if (this._object) { addChainWatcher(this._object, this._key, this); }
  }

  // Special-case: the EachProxy relies on immediate evaluation to
  // establish its observers.
  //
  // TODO: Replace this with an efficient callback that the EachProxy
  // can implement.
  if (this._parent && this._parent._key === '@each') {
    this.value();
  }
};

var ChainNodePrototype = ChainNode.prototype;

ChainNodePrototype.value = function() {
  if (this._value === undefined && this._watching) {
    var obj = this._parent.value();
    this._value = (obj && !isProto(obj)) ? get(obj, this._key) : undefined;
  }
  return this._value;
};

ChainNodePrototype.destroy = function() {
  if (this._watching) {
    var obj = this._object;
    if (obj) { removeChainWatcher(obj, this._key, this); }
    this._watching = false; // so future calls do nothing
  }
};

// copies a top level object only
ChainNodePrototype.copy = function(obj) {
  var ret = new ChainNode(null, null, obj, this._separator),
      paths = this._paths, path;
  for (path in paths) {
    if (paths[path] <= 0) { continue; } // this check will also catch non-number vals.
    ret.add(path);
  }
  return ret;
};

// called on the root node of a chain to setup watchers on the specified
// path.
ChainNodePrototype.add = function(path) {
  var obj, tuple, key, src, separator, paths;

  paths = this._paths;
  paths[path] = (paths[path] || 0) + 1;

  obj = this.value();
  tuple = normalizeTuple(obj, path);

  // the path was a local path
  if (tuple[0] && tuple[0] === obj) {
    path = tuple[1];
    key  = firstKey(path);
    path = path.slice(key.length+1);

  // global path, but object does not exist yet.
  // put into a queue and try to connect later.
  } else if (!tuple[0]) {
    pendingQueue.push([this, path]);
    tuple.length = 0;
    return;

  // global path, and object already exists
  } else {
    src  = tuple[0];
    key  = path.slice(0, 0-(tuple[1].length+1));
    separator = path.slice(key.length, key.length+1);
    path = tuple[1];
  }

  tuple.length = 0;
  this.chain(key, path, src, separator);
};

// called on the root node of a chain to teardown watcher on the specified
// path
ChainNodePrototype.remove = function(path) {
  var obj, tuple, key, src, paths;

  paths = this._paths;
  if (paths[path] > 0) { paths[path]--; }

  obj = this.value();
  tuple = normalizeTuple(obj, path);
  if (tuple[0] === obj) {
    path = tuple[1];
    key  = firstKey(path);
    path = path.slice(key.length+1);
  } else {
    src  = tuple[0];
    key  = path.slice(0, 0-(tuple[1].length+1));
    path = tuple[1];
  }

  tuple.length = 0;
  this.unchain(key, path);
};

ChainNodePrototype.count = 0;

ChainNodePrototype.chain = function(key, path, src, separator) {
  var chains = this._chains, node;
  if (!chains) { chains = this._chains = {}; }

  node = chains[key];
  if (!node) { node = chains[key] = new ChainNode(this, key, src, separator); }
  node.count++; // count chains...

  // chain rest of path if there is one
  if (path && path.length>0) {
    key = firstKey(path);
    path = path.slice(key.length+1);
    node.chain(key, path); // NOTE: no src means it will observe changes...
  }
};

ChainNodePrototype.unchain = function(key, path) {
  var chains = this._chains, node = chains[key];

  // unchain rest of path first...
  if (path && path.length>1) {
    key  = firstKey(path);
    path = path.slice(key.length+1);
    node.unchain(key, path);
  }

  // delete node if needed.
  node.count--;
  if (node.count<=0) {
    delete chains[node._key];
    node.destroy();
  }

};

ChainNodePrototype.willChange = function() {
  var chains = this._chains;
  if (chains) {
    for(var key in chains) {
      if (!chains.hasOwnProperty(key)) { continue; }
      chains[key].willChange();
    }
  }

  if (this._parent) { this._parent.chainWillChange(this, this._key, 1); }
};

ChainNodePrototype.chainWillChange = function(chain, path, depth) {
  if (this._key) { path = this._key + this._separator + path; }

  if (this._parent) {
    this._parent.chainWillChange(this, path, depth+1);
  } else {
    if (depth > 1) { Ember.propertyWillChange(this.value(), path); }
    path = 'this.' + path;
    if (this._paths[path] > 0) { Ember.propertyWillChange(this.value(), path); }
  }
};

ChainNodePrototype.chainDidChange = function(chain, path, depth) {
  if (this._key) { path = this._key + this._separator + path; }
  if (this._parent) {
    this._parent.chainDidChange(this, path, depth+1);
  } else {
    if (depth > 1) { Ember.propertyDidChange(this.value(), path); }
    path = 'this.' + path;
    if (this._paths[path] > 0) { Ember.propertyDidChange(this.value(), path); }
  }
};

ChainNodePrototype.didChange = function(suppressEvent) {
  // invalidate my own value first.
  if (this._watching) {
    var obj = this._parent.value();
    if (obj !== this._object) {
      removeChainWatcher(this._object, this._key, this);
      this._object = obj;
      addChainWatcher(obj, this._key, this);
    }
    this._value  = undefined;

    // Special-case: the EachProxy relies on immediate evaluation to
    // establish its observers.
    if (this._parent && this._parent._key === '@each')
      this.value();
  }

  // then notify chains...
  var chains = this._chains;
  if (chains) {
    for(var key in chains) {
      if (!chains.hasOwnProperty(key)) { continue; }
      chains[key].didChange(suppressEvent);
    }
  }

  if (suppressEvent) { return; }

  // and finally tell parent about my path changing...
  if (this._parent) { this._parent.chainDidChange(this, this._key, 1); }
};

// get the chains for the current object.  If the current object has
// chains inherited from the proto they will be cloned and reconfigured for
// the current object.
function chainsFor(obj) {
  var m = metaFor(obj), ret = m.chains;
  if (!ret) {
    ret = m.chains = new ChainNode(null, null, obj);
  } else if (ret.value() !== obj) {
    ret = m.chains = ret.copy(obj);
  }
  return ret;
}

function notifyChains(obj, m, keyName, methodName, arg) {
  var nodes = m.chainWatchers;

  if (!nodes || nodes.__emberproto__ !== obj) { return; } // nothing to do

  nodes = nodes[keyName];
  if (!nodes) { return; }

  for(var key in nodes) {
    if (!nodes.hasOwnProperty(key)) { continue; }
    nodes[key][methodName](arg);
  }
}

Ember.overrideChains = function(obj, keyName, m) {
  notifyChains(obj, m, keyName, 'didChange', true);
};

function chainsWillChange(obj, keyName, m) {
  notifyChains(obj, m, keyName, 'willChange');
}

function chainsDidChange(obj, keyName, m) {
  notifyChains(obj, m, keyName, 'didChange');
}

// ..........................................................
// WATCH
//

/**
  @private

  Starts watching a property on an object.  Whenever the property changes,
  invokes Ember.propertyWillChange and Ember.propertyDidChange.  This is the
  primitive used by observers and dependent keys; usually you will never call
  this method directly but instead use higher level methods like
  Ember.addObserver().

  @method watch
  @for Ember
  @param obj
  @param {String} keyName
*/
Ember.watch = function(obj, keyName) {
  // can't watch length on Array - it is special...
  if (keyName === 'length' && Ember.typeOf(obj) === 'array') { return this; }

  var m = metaFor(obj), watching = m.watching, desc;

  // activate watching first time
  if (!watching[keyName]) {
    watching[keyName] = 1;
    if (isKeyName(keyName)) {
      desc = m.descs[keyName];
      if (desc && desc.willWatch) { desc.willWatch(obj, keyName); }

      if ('function' === typeof obj.willWatchProperty) {
        obj.willWatchProperty(keyName);
      }

      if (MANDATORY_SETTER && keyName in obj) {
        m.values[keyName] = obj[keyName];
        o_defineProperty(obj, keyName, {
          configurable: true,
          enumerable: true,
          set: function() {
            Ember.assert('Must use Ember.set() to access this property', false);
          },
          get: function() {
            var meta = this[META_KEY];
            return meta && meta.values[keyName];
          }
        });
      }
    } else {
      chainsFor(obj).add(keyName);
    }

  }  else {
    watching[keyName] = (watching[keyName] || 0) + 1;
  }
  return this;
};

Ember.isWatching = function isWatching(obj, key) {
  var meta = obj[META_KEY];
  return (meta && meta.watching[key]) > 0;
};

Ember.watch.flushPending = flushPendingChains;

Ember.unwatch = function(obj, keyName) {
  // can't watch length on Array - it is special...
  if (keyName === 'length' && Ember.typeOf(obj) === 'array') { return this; }

  var m = metaFor(obj), watching = m.watching, desc;

  if (watching[keyName] === 1) {
    watching[keyName] = 0;

    if (isKeyName(keyName)) {
      desc = m.descs[keyName];
      if (desc && desc.didUnwatch) { desc.didUnwatch(obj, keyName); }

      if ('function' === typeof obj.didUnwatchProperty) {
        obj.didUnwatchProperty(keyName);
      }

      if (MANDATORY_SETTER && keyName in obj) {
        o_defineProperty(obj, keyName, {
          configurable: true,
          enumerable: true,
          writable: true,
          value: m.values[keyName]
        });
        delete m.values[keyName];
      }
    } else {
      chainsFor(obj).remove(keyName);
    }

  } else if (watching[keyName]>1) {
    watching[keyName]--;
  }

  return this;
};

/**
  @private

  Call on an object when you first beget it from another object.  This will
  setup any chained watchers on the object instance as needed.  This method is
  safe to call multiple times.

  @method rewatch
  @for Ember
  @param obj
*/
Ember.rewatch = function(obj) {
  var m = metaFor(obj, false), chains = m.chains;

  // make sure the object has its own guid.
  if (GUID_KEY in obj && !obj.hasOwnProperty(GUID_KEY)) {
    Ember.generateGuid(obj, 'ember');
  }

  // make sure any chained watchers update.
  if (chains && chains.value() !== obj) {
    m.chains = chains.copy(obj);
  }

  return this;
};

Ember.finishChains = function(obj) {
  var m = metaFor(obj, false), chains = m.chains;
  if (chains) {
    if (chains.value() !== obj) {
      m.chains = chains = chains.copy(obj);
    }
    chains.didChange(true);
  }
};

// ..........................................................
// PROPERTY CHANGES
//

/**
  This function is called just before an object property is about to change.
  It will notify any before observers and prepare caches among other things.

  Normally you will not need to call this method directly but if for some
  reason you can't directly watch a property you can invoke this method
  manually along with `Ember.propertyDidChange()` which you should call just
  after the property value changes.

  @method propertyWillChange
  @for Ember
  @param {Object} obj The object with the property that will change
  @param {String} keyName The property key (or path) that will change.
  @return {void}
*/
function propertyWillChange(obj, keyName, value) {
  var m = metaFor(obj, false),
      watching = m.watching[keyName] > 0 || keyName === 'length',
      proto = m.proto,
      desc = m.descs[keyName];

  if (!watching) { return; }
  if (proto === obj) { return; }
  if (desc && desc.willChange) { desc.willChange(obj, keyName); }
  dependentKeysWillChange(obj, keyName, m);
  chainsWillChange(obj, keyName, m);
  Ember.notifyBeforeObservers(obj, keyName);
}

Ember.propertyWillChange = propertyWillChange;

/**
  This function is called just after an object property has changed.
  It will notify any observers and clear caches among other things.

  Normally you will not need to call this method directly but if for some
  reason you can't directly watch a property you can invoke this method
  manually along with `Ember.propertyWilLChange()` which you should call just
  before the property value changes.

  @method propertyDidChange
  @for Ember
  @param {Object} obj The object with the property that will change
  @param {String} keyName The property key (or path) that will change.
  @return {void}
*/
function propertyDidChange(obj, keyName) {
  var m = metaFor(obj, false),
      watching = m.watching[keyName] > 0 || keyName === 'length',
      proto = m.proto,
      desc = m.descs[keyName];

  if (proto === obj) { return; }

  // shouldn't this mean that we're watching this key?
  if (desc && desc.didChange) { desc.didChange(obj, keyName); }
  if (!watching && keyName !== 'length') { return; }

  dependentKeysDidChange(obj, keyName, m);
  chainsDidChange(obj, keyName, m);
  Ember.notifyObservers(obj, keyName);
}

Ember.propertyDidChange = propertyDidChange;

var NODE_STACK = [];

/**
  Tears down the meta on an object so that it can be garbage collected.
  Multiple calls will have no effect.

  @method destroy
  @for Ember
  @param {Object} obj  the object to destroy
  @return {void}
*/
Ember.destroy = function (obj) {
  var meta = obj[META_KEY], node, nodes, key, nodeObject;
  if (meta) {
    obj[META_KEY] = null;
    // remove chainWatchers to remove circular references that would prevent GC
    node = meta.chains;
    if (node) {
      NODE_STACK.push(node);
      // process tree
      while (NODE_STACK.length > 0) {
        node = NODE_STACK.pop();
        // push children
        nodes = node._chains;
        if (nodes) {
          for (key in nodes) {
            if (nodes.hasOwnProperty(key)) {
              NODE_STACK.push(nodes[key]);
            }
          }
        }
        // remove chainWatcher in node object
        if (node._watching) {
          nodeObject = node._object;
          if (nodeObject) {
            removeChainWatcher(nodeObject, node._key, node);
          }
        }
      }
    }
  }
};

})();

(function() {
/**
@module ember-metal
*/

Ember.warn("Computed properties will soon be cacheable by default. To enable this in your app, set `ENV.CP_DEFAULT_CACHEABLE = true`.", Ember.CP_DEFAULT_CACHEABLE);

var get = Ember.get,
    metaFor = Ember.meta,
    guidFor = Ember.guidFor,
    a_slice = [].slice,
    o_create = Ember.create,
    META_KEY = Ember.META_KEY,
    watch = Ember.watch,
    unwatch = Ember.unwatch;

// ..........................................................
// DEPENDENT KEYS
//

// data structure:
//  meta.deps = {
//   'depKey': {
//     'keyName': count,
//     __emberproto__: SRC_OBJ [to detect clones]
//     },
//   __emberproto__: SRC_OBJ
//  }

/*
  This function returns a map of unique dependencies for a
  given object and key.
*/
function keysForDep(obj, depsMeta, depKey) {
  var keys = depsMeta[depKey];
  if (!keys) {
    // if there are no dependencies yet for a the given key
    // create a new empty list of dependencies for the key
    keys = depsMeta[depKey] = { __emberproto__: obj };
  } else if (keys.__emberproto__ !== obj) {
    // otherwise if the dependency list is inherited from
    // a superclass, clone the hash
    keys = depsMeta[depKey] = o_create(keys);
    keys.__emberproto__ = obj;
  }
  return keys;
}

/* return obj[META_KEY].deps */
function metaForDeps(obj, meta) {
  var deps = meta.deps;
  // If the current object has no dependencies...
  if (!deps) {
    // initialize the dependencies with a pointer back to
    // the current object
    deps = meta.deps = { __emberproto__: obj };
  } else if (deps.__emberproto__ !== obj) {
    // otherwise if the dependencies are inherited from the
    // object's superclass, clone the deps
    deps = meta.deps = o_create(deps);
    deps.__emberproto__ = obj;
  }
  return deps;
}

function addDependentKeys(desc, obj, keyName, meta) {
  // the descriptor has a list of dependent keys, so
  // add all of its dependent keys.
  var depKeys = desc._dependentKeys, depsMeta, idx, len, depKey, keys;
  if (!depKeys) return;

  depsMeta = metaForDeps(obj, meta);

  for(idx = 0, len = depKeys.length; idx < len; idx++) {
    depKey = depKeys[idx];
    // Lookup keys meta for depKey
    keys = keysForDep(obj, depsMeta, depKey);
    // Increment the number of times depKey depends on keyName.
    keys[keyName] = (keys[keyName] || 0) + 1;
    // Watch the depKey
    watch(obj, depKey);
  }
}

function removeDependentKeys(desc, obj, keyName, meta) {
  // the descriptor has a list of dependent keys, so
  // add all of its dependent keys.
  var depKeys = desc._dependentKeys, depsMeta, idx, len, depKey, keys;
  if (!depKeys) return;

  depsMeta = metaForDeps(obj, meta);

  for(idx = 0, len = depKeys.length; idx < len; idx++) {
    depKey = depKeys[idx];
    // Lookup keys meta for depKey
    keys = keysForDep(obj, depsMeta, depKey);
    // Increment the number of times depKey depends on keyName.
    keys[keyName] = (keys[keyName] || 0) - 1;
    // Watch the depKey
    unwatch(obj, depKey);
  }
}

// ..........................................................
// COMPUTED PROPERTY
//

/**
  @class ComputedProperty
  @namespace Ember
  @extends Ember.Descriptor
  @constructor
*/
function ComputedProperty(func, opts) {
  this.func = func;
  this._cacheable = (opts && opts.cacheable !== undefined) ? opts.cacheable : Ember.CP_DEFAULT_CACHEABLE;
  this._dependentKeys = opts && opts.dependentKeys;
}

Ember.ComputedProperty = ComputedProperty;
ComputedProperty.prototype = new Ember.Descriptor();

var ComputedPropertyPrototype = ComputedProperty.prototype;

/**
  Call on a computed property to set it into cacheable mode.  When in this
  mode the computed property will automatically cache the return value of
  your function until one of the dependent keys changes.

      MyApp.president = Ember.Object.create({
        fullName: function() {
          return this.get('firstName') + ' ' + this.get('lastName');

          // After calculating the value of this function, Ember.js will
          // return that value without re-executing this function until
          // one of the dependent properties change.
        }.property('firstName', 'lastName').cacheable()
      });

  Properties are cacheable by default.

  @method cacheable
  @param {Boolean} aFlag optional set to false to disable caching
  @chainable
*/
ComputedPropertyPrototype.cacheable = function(aFlag) {
  this._cacheable = aFlag !== false;
  return this;
};

/**
  Call on a computed property to set it into non-cached mode.  When in this
  mode the computed property will not automatically cache the return value.

      MyApp.outsideService = Ember.Object.create({
        value: function() {
          return OutsideService.getValue();
        }.property().volatile()
      });

  @method volatile
  @chainable
*/
ComputedPropertyPrototype.volatile = function() {
  return this.cacheable(false);
};

/**
  Sets the dependent keys on this computed property.  Pass any number of
  arguments containing key paths that this computed property depends on.

      MyApp.president = Ember.Object.create({
        fullName: Ember.computed(function() {
          return this.get('firstName') + ' ' + this.get('lastName');

          // Tell Ember.js that this computed property depends on firstName
          // and lastName
        }).property('firstName', 'lastName')
      });

  @method property
  @param {String} path* zero or more property paths
  @chainable
*/
ComputedPropertyPrototype.property = function() {
  var args = [];
  for (var i = 0, l = arguments.length; i < l; i++) {
    args.push(arguments[i]);
  }
  this._dependentKeys = args;
  return this;
};

/**
  In some cases, you may want to annotate computed properties with additional
  metadata about how they function or what values they operate on. For example,
  computed property functions may close over variables that are then no longer
  available for introspection.

  You can pass a hash of these values to a computed property like this:

      person: function() {
        var personId = this.get('personId');
        return App.Person.create({ id: personId });
      }.property().meta({ type: App.Person })

  The hash that you pass to the `meta()` function will be saved on the
  computed property descriptor under the `_meta` key. Ember runtime
  exposes a public API for retrieving these values from classes,
  via the `metaForProperty()` function.

  @method meta
  @param {Hash} meta
  @chainable
*/

ComputedPropertyPrototype.meta = function(meta) {
  if (arguments.length === 0) {
    return this._meta || {};
  } else {
    this._meta = meta;
    return this;
  }
};

/* impl descriptor API */
ComputedPropertyPrototype.willWatch = function(obj, keyName) {
  // watch already creates meta for this instance
  var meta = obj[META_KEY];
  Ember.assert('watch should have setup meta to be writable', meta.source === obj);
  if (!(keyName in meta.cache)) {
    addDependentKeys(this, obj, keyName, meta);
  }
};

ComputedPropertyPrototype.didUnwatch = function(obj, keyName) {
  var meta = obj[META_KEY];
  Ember.assert('unwatch should have setup meta to be writable', meta.source === obj);
  if (!(keyName in meta.cache)) {
    // unwatch already creates meta for this instance
    removeDependentKeys(this, obj, keyName, meta);
  }
};

/* impl descriptor API */
ComputedPropertyPrototype.didChange = function(obj, keyName) {
  // _suspended is set via a CP.set to ensure we don't clear
  // the cached value set by the setter
  if (this._cacheable && this._suspended !== obj) {
    var meta = metaFor(obj);
    if (keyName in meta.cache) {
      delete meta.cache[keyName];
      if (!meta.watching[keyName]) {
        removeDependentKeys(this, obj, keyName, meta);
      }
    }
  }
};

/* impl descriptor API */
ComputedPropertyPrototype.get = function(obj, keyName) {
  var ret, cache, meta;
  if (this._cacheable) {
    meta = metaFor(obj);
    cache = meta.cache;
    if (keyName in cache) { return cache[keyName]; }
    ret = cache[keyName] = this.func.call(obj, keyName);
    if (!meta.watching[keyName]) {
      addDependentKeys(this, obj, keyName, meta);
    }
  } else {
    ret = this.func.call(obj, keyName);
  }
  return ret;
};

/* impl descriptor API */
ComputedPropertyPrototype.set = function(obj, keyName, value) {
  var cacheable = this._cacheable,
      meta = metaFor(obj, cacheable),
      watched = meta.watching[keyName],
      oldSuspended = this._suspended,
      hadCachedValue = false,
      ret;
  this._suspended = obj;
  try {
    ret = this.func.call(obj, keyName, value);

    if (cacheable && keyName in meta.cache) {
      if (meta.cache[keyName] === ret) {
        return;
      }
      hadCachedValue = true;
    }

    if (watched) { Ember.propertyWillChange(obj, keyName); }

    if (cacheable && hadCachedValue) {
      delete meta.cache[keyName];
    }

    if (cacheable) {
      if (!watched && !hadCachedValue) {
        addDependentKeys(this, obj, keyName, meta);
      }
      meta.cache[keyName] = ret;
    }

    if (watched) { Ember.propertyDidChange(obj, keyName); }
  } finally {
    this._suspended = oldSuspended;
  }
  return ret;
};

/* called when property is defined */
ComputedPropertyPrototype.setup = function(obj, keyName) {
  var meta = obj[META_KEY];
  if (meta && meta.watching[keyName]) {
    addDependentKeys(this, obj, keyName, metaFor(obj));
  }
};

/* called before property is overridden */
ComputedPropertyPrototype.teardown = function(obj, keyName) {
  var meta = metaFor(obj);

  if (meta.watching[keyName] || keyName in meta.cache) {
    removeDependentKeys(this, obj, keyName, meta);
  }

  if (this._cacheable) { delete meta.cache[keyName]; }

  return null; // no value to restore
};

/**
  This helper returns a new property descriptor that wraps the passed
  computed property function.  You can use this helper to define properties
  with mixins or via Ember.defineProperty().

  The function you pass will be used to both get and set property values.
  The function should accept two parameters, key and value.  If value is not
  undefined you should set the value first.  In either case return the
  current value of the property.

  @method computed
  @for Ember
  @param {Function} func The computed property function.
  @return {Ember.ComputedProperty} property descriptor instance
*/
Ember.computed = function(func) {
  var args;

  if (arguments.length > 1) {
    args = a_slice.call(arguments, 0, -1);
    func = a_slice.call(arguments, -1)[0];
  }

  var cp = new ComputedProperty(func);

  if (args) {
    cp.property.apply(cp, args);
  }

  return cp;
};

/**
  Returns the cached value for a property, if one exists.
  This can be useful for peeking at the value of a computed
  property that is generated lazily, without accidentally causing
  it to be created.

  @method cacheFor
  @for Ember
  @param {Object} obj the object whose property you want to check
  @param {String} key the name of the property whose cached value you want
                      to return
*/
Ember.cacheFor = function cacheFor(obj, key) {
  var cache = metaFor(obj, false).cache;

  if (cache && key in cache) {
    return cache[key];
  }
};

/**
  @method computed.not
  @for Ember
  @param {String} dependentKey
*/
Ember.computed.not = function(dependentKey) {
  return Ember.computed(dependentKey, function(key) {
    return !get(this, dependentKey);
  }).cacheable();
};

/**
  @method computed.empty
  @for Ember
  @param {String} dependentKey
*/
Ember.computed.empty = function(dependentKey) {
  return Ember.computed(dependentKey, function(key) {
    var val = get(this, dependentKey);
    return val === undefined || val === null || val === '' || (Ember.isArray(val) && get(val, 'length') === 0);
  }).cacheable();
};

/**
  @method computed.bool
  @for Ember
  @param {String} dependentKey
*/
Ember.computed.bool = function(dependentKey) {
  return Ember.computed(dependentKey, function(key) {
    return !!get(this, dependentKey);
  }).cacheable();
};

})();

(function() {
/**
@module ember-metal
*/

var o_create = Ember.create,
    meta = Ember.meta,
    metaPath = Ember.metaPath,
    guidFor = Ember.guidFor,
    a_slice = [].slice;

/*
  The event system uses a series of nested hashes to store listeners on an
  object. When a listener is registered, or when an event arrives, these
  hashes are consulted to determine which target and action pair to invoke.

  The hashes are stored in the object's meta hash, and look like this:

      // Object's meta hash
      {
        listeners: {               // variable name: `listenerSet`
          "foo:changed": {         // variable name: `targetSet`
            [targetGuid]: {        // variable name: `actionSet`
              [methodGuid]: {      // variable name: `action`
                target: [Object object],
                method: [Function function]
              }
            }
          }
        }
      }

*/

// Gets the set of all actions, keyed on the guid of each action's
// method property.
function actionSetFor(obj, eventName, target, writable) {
  return metaPath(obj, ['listeners', eventName, guidFor(target)], writable);
}

// Gets the set of all targets, keyed on the guid of each action's
// target property.
function targetSetFor(obj, eventName) {
  var listenerSet = meta(obj, false).listeners;
  if (!listenerSet) { return false; }

  return listenerSet[eventName] || false;
}

// TODO: This knowledge should really be a part of the
// meta system.
var SKIP_PROPERTIES = { __ember_source__: true };

function iterateSet(obj, eventName, callback, params) {
  var targetSet = targetSetFor(obj, eventName);
  if (!targetSet) { return false; }
  // Iterate through all elements of the target set
  for(var targetGuid in targetSet) {
    if (SKIP_PROPERTIES[targetGuid]) { continue; }

    var actionSet = targetSet[targetGuid];
    if (actionSet) {
      // Iterate through the elements of the action set
      for(var methodGuid in actionSet) {
        if (SKIP_PROPERTIES[methodGuid]) { continue; }

        var action = actionSet[methodGuid];
        if (action) {
          if (callback(action, params, obj) === true) {
            return true;
          }
        }
      }
    }
  }
  return false;
}

function invokeAction(action, params, sender) {
  var method = action.method, target = action.target;
  // If there is no target, the target is the object
  // on which the event was fired.
  if (!target) { target = sender; }
  if ('string' === typeof method) { method = target[method]; }
  if (params) {
    method.apply(target, params);
  } else {
    method.apply(target);
  }
}

/**
  Add an event listener

  @method addListener
  @for Ember
  @param obj
  @param {String} eventName
  @param {Object|Function} targetOrMethod A target object or a function
  @param {Function|String} method A function or the name of a function to be called on `target`
*/
function addListener(obj, eventName, target, method, guid) {
  Ember.assert("You must pass at least an object and event name to Ember.addListener", !!obj && !!eventName);

  if (!method && 'function' === typeof target) {
    method = target;
    target = null;
  }

  var actionSet = actionSetFor(obj, eventName, target, true),
      // guid is used in case we wrapp given method to register
      // listener with method guid instead of the wrapper guid
      methodGuid = guid || guidFor(method);

  if (!actionSet[methodGuid]) {
    actionSet[methodGuid] = { target: target, method: method };
  }

  if ('function' === typeof obj.didAddListener) {
    obj.didAddListener(eventName, target, method);
  }
}

/**
  Remove an event listener

  Arguments should match those passed to {{#crossLink "Ember/addListener"}}{{/crossLink}}

  @method removeListener
  @for Ember
  @param obj
  @param {String} eventName
  @param {Object|Function} targetOrMethod A target object or a function
  @param {Function|String} method A function or the name of a function to be called on `target`
*/
function removeListener(obj, eventName, target, method) {
  Ember.assert("You must pass at least an object and event name to Ember.removeListener", !!obj && !!eventName);

  if (!method && 'function' === typeof target) {
    method = target;
    target = null;
  }

  function _removeListener(target, method) {
    var actionSet = actionSetFor(obj, eventName, target, true),
        methodGuid = guidFor(method);

    // we can't simply delete this parameter, because if we do, we might
    // re-expose the property from the prototype chain.
    if (actionSet && actionSet[methodGuid]) { actionSet[methodGuid] = null; }

    if ('function' === typeof obj.didRemoveListener) {
      obj.didRemoveListener(eventName, target, method);
    }
  }

  if (method) {
    _removeListener(target, method);
  } else {
    iterateSet(obj, eventName, function(action) {
      _removeListener(action.target, action.method);
    });
  }
}

/**
  @private

  Suspend listener during callback.

  This should only be used by the target of the event listener
  when it is taking an action that would cause the event, e.g.
  an object might suspend its property change listener while it is
  setting that property.

  @method suspendListener
  @for Ember
  @param obj
  @param {String} eventName
  @param {Object|Function} targetOrMethod A target object or a function
  @param {Function|String} method A function or the name of a function to be called on `target`
  @param {Function} callback
*/
function suspendListener(obj, eventName, target, method, callback) {
  if (!method && 'function' === typeof target) {
    method = target;
    target = null;
  }

  var actionSet = actionSetFor(obj, eventName, target, true),
      methodGuid = guidFor(method),
      action = actionSet && actionSet[methodGuid];

  actionSet[methodGuid] = null;
  try {
    return callback.call(target);
  } finally {
    actionSet[methodGuid] = action;
  }
}

/**
  @private

  Suspend listener during callback.

  This should only be used by the target of the event listener
  when it is taking an action that would cause the event, e.g.
  an object might suspend its property change listener while it is
  setting that property.

  @method suspendListener
  @for Ember
  @param obj
  @param {Array} eventName Array of event names
  @param {Object|Function} targetOrMethod A target object or a function
  @param {Function|String} method A function or the name of a function to be called on `target`
  @param {Function} callback
*/
function suspendListeners(obj, eventNames, target, method, callback) {
  if (!method && 'function' === typeof target) {
    method = target;
    target = null;
  }

  var oldActions = [],
      actionSets = [],
      eventName, actionSet, methodGuid, action, i, l;

  for (i=0, l=eventNames.length; i<l; i++) {
    eventName = eventNames[i];
    actionSet = actionSetFor(obj, eventName, target, true),
    methodGuid = guidFor(method);

    oldActions.push(actionSet && actionSet[methodGuid]);
    actionSets.push(actionSet);

    actionSet[methodGuid] = null;
  }

  try {
    return callback.call(target);
  } finally {
    for (i=0, l=oldActions.length; i<l; i++) {
      eventName = eventNames[i];
      actionSets[i][methodGuid] = oldActions[i];
    }
  }
}

/**
  @private

  Return a list of currently watched events

  @method watchedEvents
  @for Ember
  @param obj
*/
function watchedEvents(obj) {
  var listeners = meta(obj, false).listeners, ret = [];

  if (listeners) {
    for(var eventName in listeners) {
      if (!SKIP_PROPERTIES[eventName] && listeners[eventName]) {
        ret.push(eventName);
      }
    }
  }
  return ret;
}

/**
  @method sendEvent
  @for Ember
  @param obj
  @param {String} eventName
  @param {Array} params
  @return true
*/
function sendEvent(obj, eventName, params) {
  // first give object a chance to handle it
  if (obj !== Ember && 'function' === typeof obj.sendEvent) {
    obj.sendEvent(eventName, params);
  }

  iterateSet(obj, eventName, invokeAction, params);
  return true;
}

/**
  @private
  @method deferEvent
  @for Ember
  @param obj
  @param {String} eventName
  @param {Array} params
*/
function deferEvent(obj, eventName, params) {
  var actions = [];
  iterateSet(obj, eventName, function (action) {
    actions.push(action);
  });

  return function() {
    if (obj.isDestroyed) { return; }

    if (obj !== Ember && 'function' === typeof obj.sendEvent) {
      obj.sendEvent(eventName, params);
    }

    for (var i=0, len=actions.length; i < len; ++i) {
      invokeAction(actions[i], params, obj);
    }
  };
}

/**
  @private
  @method hasListeners
  @for Ember
  @param obj
  @param {String} eventName
*/
function hasListeners(obj, eventName) {
  if (iterateSet(obj, eventName, function() { return true; })) {
    return true;
  }

  // no listeners!  might as well clean this up so it is faster later.
  var set = metaPath(obj, ['listeners'], true);
  set[eventName] = null;

  return false;
}

/**
  @private
  @method listenersFor
  @for Ember
  @param obj
  @param {String} eventName
*/
function listenersFor(obj, eventName) {
  var ret = [];
  iterateSet(obj, eventName, function (action) {
    ret.push([action.target, action.method]);
  });
  return ret;
}

Ember.addListener = addListener;
Ember.removeListener = removeListener;
Ember._suspendListener = suspendListener;
Ember._suspendListeners = suspendListeners;
Ember.sendEvent = sendEvent;
Ember.hasListeners = hasListeners;
Ember.watchedEvents = watchedEvents;
Ember.listenersFor = listenersFor;
Ember.deferEvent = deferEvent;

})();

(function() {
// Ember.Logger
// Ember.watch.flushPending
// Ember.beginPropertyChanges, Ember.endPropertyChanges
// Ember.guidFor

/**
@module ember-metal
*/

// ..........................................................
// HELPERS
//

var slice = [].slice,
    forEach = Ember.ArrayPolyfills.forEach;

// invokes passed params - normalizing so you can pass target/func,
// target/string or just func
function invoke(target, method, args, ignore) {

  if (method === undefined) {
    method = target;
    target = undefined;
  }

  if ('string' === typeof method) { method = target[method]; }
  if (args && ignore > 0) {
    args = args.length > ignore ? slice.call(args, ignore) : null;
  }

  return Ember.handleErrors(function() {
    // IE8's Function.prototype.apply doesn't accept undefined/null arguments.
    return method.apply(target || this, args || []);
  }, this);
}

// ..........................................................
// RUNLOOP
//

var timerMark; // used by timers...

/**
Ember RunLoop (Private)

@class RunLoop
@namespace Ember
@private
@constructor
*/
var RunLoop = function(prev) {
  this._prev = prev || null;
  this.onceTimers = {};
};

RunLoop.prototype = {
  /**
    @method end
  */
  end: function() {
    this.flush();
  },

  /**
    @method prev
  */
  prev: function() {
    return this._prev;
  },

  // ..........................................................
  // Delayed Actions
  //

  /**
    @method schedule
    @param {String} queueName
    @param target
    @param method
  */
  schedule: function(queueName, target, method) {
    var queues = this._queues, queue;
    if (!queues) { queues = this._queues = {}; }
    queue = queues[queueName];
    if (!queue) { queue = queues[queueName] = []; }

    var args = arguments.length > 3 ? slice.call(arguments, 3) : null;
    queue.push({ target: target, method: method, args: args });
    return this;
  },

  /**
    @method flush
    @param {String} queueName
  */
  flush: function(queueName) {
    var queueNames, idx, len, queue, log;

    if (!this._queues) { return this; } // nothing to do

    function iter(item) {
      invoke(item.target, item.method, item.args);
    }

    Ember.watch.flushPending(); // make sure all chained watchers are setup

    if (queueName) {
      while (this._queues && (queue = this._queues[queueName])) {
        this._queues[queueName] = null;

        // the sync phase is to allow property changes to propagate.  don't
        // invoke observers until that is finished.
        if (queueName === 'sync') {
          log = Ember.LOG_BINDINGS;
          if (log) { Ember.Logger.log('Begin: Flush Sync Queue'); }

          Ember.beginPropertyChanges();
          try {
            forEach.call(queue, iter);
          } finally {
            Ember.endPropertyChanges();
          }

          if (log) { Ember.Logger.log('End: Flush Sync Queue'); }

        } else {
          forEach.call(queue, iter);
        }
      }

    } else {
      queueNames = Ember.run.queues;
      len = queueNames.length;
      idx = 0;

      outerloop:
      while (idx < len) {
        queueName = queueNames[idx];
        queue = this._queues && this._queues[queueName];
        delete this._queues[queueName];

        if (queue) {
          // the sync phase is to allow property changes to propagate.  don't
          // invoke observers until that is finished.
          if (queueName === 'sync') {
            log = Ember.LOG_BINDINGS;
            if (log) { Ember.Logger.log('Begin: Flush Sync Queue'); }

            Ember.beginPropertyChanges();
            try {
              forEach.call(queue, iter);
            } finally {
              Ember.endPropertyChanges();
            }

            if (log) { Ember.Logger.log('End: Flush Sync Queue'); }
          } else {
            forEach.call(queue, iter);
          }
        }

        // Loop through prior queues
        for (var i = 0; i <= idx; i++) {
          if (this._queues && this._queues[queueNames[i]]) {
            // Start over at the first queue with contents
            idx = i;
            continue outerloop;
          }
        }

        idx++;
      }
    }

    timerMark = null;

    return this;
  }

};

Ember.RunLoop = RunLoop;

// ..........................................................
// Ember.run - this is ideally the only public API the dev sees
//

/**
  Runs the passed target and method inside of a RunLoop, ensuring any
  deferred actions including bindings and views updates are flushed at the
  end.

  Normally you should not need to invoke this method yourself.  However if
  you are implementing raw event handlers when interfacing with other
  libraries or plugins, you should probably wrap all of your code inside this
  call.

      Ember.run(function(){
        // code to be execute within a RunLoop
      });

  @class run
  @namespace Ember
  @static
  @constructor
  @param {Object} [target] target of method to call
  @param {Function|String} method Method to invoke.
    May be a function or a string.  If you pass a string
    then it will be looked up on the passed target.
  @param {Object} [args*] Any additional arguments you wish to pass to the method.
  @return {Object} return value from invoking the passed function.
*/
Ember.run = function(target, method) {
  var ret, loop;
  run.begin();
  try {
    if (target || method) { ret = invoke(target, method, arguments, 2); }
  } finally {
    run.end();
  }
  return ret;
};

var run = Ember.run;

/**
  Begins a new RunLoop.  Any deferred actions invoked after the begin will
  be buffered until you invoke a matching call to Ember.run.end().  This is
  an lower-level way to use a RunLoop instead of using Ember.run().

      Ember.run.begin();
      // code to be execute within a RunLoop
      Ember.run.end();

  @method begin
  @return {void}
*/
Ember.run.begin = function() {
  run.currentRunLoop = new RunLoop(run.currentRunLoop);
};

/**
  Ends a RunLoop.  This must be called sometime after you call Ember.run.begin()
  to flush any deferred actions.  This is a lower-level way to use a RunLoop
  instead of using Ember.run().

      Ember.run.begin();
      // code to be execute within a RunLoop
      Ember.run.end();

  @method end
  @return {void}
*/
Ember.run.end = function() {
  Ember.assert('must have a current run loop', run.currentRunLoop);
  try {
    run.currentRunLoop.end();
  }
  finally {
    run.currentRunLoop = run.currentRunLoop.prev();
  }
};

/**
  Array of named queues.  This array determines the order in which queues
  are flushed at the end of the RunLoop.  You can define your own queues by
  simply adding the queue name to this array.  Normally you should not need
  to inspect or modify this property.

  @property queues
  @type Array
  @default ['sync', 'actions', 'destroy', 'timers']
*/
Ember.run.queues = ['sync', 'actions', 'destroy', 'timers'];

/**
  Adds the passed target/method and any optional arguments to the named
  queue to be executed at the end of the RunLoop.  If you have not already
  started a RunLoop when calling this method one will be started for you
  automatically.

  At the end of a RunLoop, any methods scheduled in this way will be invoked.
  Methods will be invoked in an order matching the named queues defined in
  the run.queues property.

      Ember.run.schedule('timers', this, function(){
        // this will be executed at the end of the RunLoop, when timers are run
        console.log("scheduled on timers queue");
      });
      Ember.run.schedule('sync', this, function(){
        // this will be executed at the end of the RunLoop, when bindings are synced
        console.log("scheduled on sync queue");
      });
      // Note the functions will be run in order based on the run queues order. Output would be:
      //   scheduled on sync queue
      //   scheduled on timers queue

  @method schedule
  @param {String} queue The name of the queue to schedule against.
    Default queues are 'sync' and 'actions'

  @param {Object} [target] target object to use as the context when invoking a method.

  @param {String|Function} method The method to invoke.  If you pass a string it
    will be resolved on the target object at the time the scheduled item is
    invoked allowing you to change the target function.

  @param {Object} [arguments*] Optional arguments to be passed to the queued method.

  @return {void}
*/
Ember.run.schedule = function(queue, target, method) {
  var loop = run.autorun();
  loop.schedule.apply(loop, arguments);
};

var scheduledAutorun;
function autorun() {
  scheduledAutorun = null;
  if (run.currentRunLoop) { run.end(); }
}

// Used by global test teardown
Ember.run.hasScheduledTimers = function() {
  return !!(scheduledAutorun || scheduledLater || scheduledNext);
};

// Used by global test teardown
Ember.run.cancelTimers = function () {
  if (scheduledAutorun) {
    clearTimeout(scheduledAutorun);
    scheduledAutorun = null;
  }
  if (scheduledLater) {
    clearTimeout(scheduledLater);
    scheduledLater = null;
  }
  if (scheduledNext) {
    clearTimeout(scheduledNext);
    scheduledNext = null;
  }
  timers = {};
};

/**
  Begins a new RunLoop if necessary and schedules a timer to flush the
  RunLoop at a later time.  This method is used by parts of Ember to
  ensure the RunLoop always finishes.  You normally do not need to call this
  method directly.  Instead use Ember.run().

  @method autorun
  @example
    Ember.run.autorun();
  @return {Ember.RunLoop} the new current RunLoop
*/
Ember.run.autorun = function() {
  if (!run.currentRunLoop) {
    Ember.assert("You have turned on testing mode, which disabled the run-loop's autorun. You will need to wrap any code with asynchronous side-effects in an Ember.run", !Ember.testing);

    run.begin();

    if (!scheduledAutorun) {
      scheduledAutorun = setTimeout(autorun, 1);
    }
  }

  return run.currentRunLoop;
};

/**
  Immediately flushes any events scheduled in the 'sync' queue.  Bindings
  use this queue so this method is a useful way to immediately force all
  bindings in the application to sync.

  You should call this method anytime you need any changed state to propagate
  throughout the app immediately without repainting the UI.

      Ember.run.sync();

  @method sync
  @return {void}
*/
Ember.run.sync = function() {
  run.autorun();
  run.currentRunLoop.flush('sync');
};

// ..........................................................
// TIMERS
//

var timers = {}; // active timers...

var scheduledLater;
function invokeLaterTimers() {
  scheduledLater = null;
  var now = (+ new Date()), earliest = -1;
  for (var key in timers) {
    if (!timers.hasOwnProperty(key)) { continue; }
    var timer = timers[key];
    if (timer && timer.expires) {
      if (now >= timer.expires) {
        delete timers[key];
        invoke(timer.target, timer.method, timer.args, 2);
      } else {
        if (earliest<0 || (timer.expires < earliest)) earliest=timer.expires;
      }
    }
  }

  // schedule next timeout to fire...
  if (earliest > 0) { scheduledLater = setTimeout(invokeLaterTimers, earliest-(+ new Date())); }
}

/**
  Invokes the passed target/method and optional arguments after a specified
  period if time.  The last parameter of this method must always be a number
  of milliseconds.

  You should use this method whenever you need to run some action after a
  period of time instead of using setTimeout().  This method will ensure that
  items that expire during the same script execution cycle all execute
  together, which is often more efficient than using a real setTimeout.

      Ember.run.later(myContext, function(){
        // code here will execute within a RunLoop in about 500ms with this == myContext
      }, 500);

  @method later
  @param {Object} [target] target of method to invoke

  @param {Function|String} method The method to invoke.
    If you pass a string it will be resolved on the
    target at the time the method is invoked.

  @param {Object} [args*] Optional arguments to pass to the timeout.

  @param {Number} wait
    Number of milliseconds to wait.

  @return {String} a string you can use to cancel the timer in
    {{#crossLink "Ember/run.cancel"}}{{/crossLink}} later.
*/
Ember.run.later = function(target, method) {
  var args, expires, timer, guid, wait;

  // setTimeout compatibility...
  if (arguments.length===2 && 'function' === typeof target) {
    wait   = method;
    method = target;
    target = undefined;
    args   = [target, method];
  } else {
    args = slice.call(arguments);
    wait = args.pop();
  }

  expires = (+ new Date()) + wait;
  timer   = { target: target, method: method, expires: expires, args: args };
  guid    = Ember.guidFor(timer);
  timers[guid] = timer;
  run.once(timers, invokeLaterTimers);
  return guid;
};

function invokeOnceTimer(guid, onceTimers) {
  if (onceTimers[this.tguid]) { delete onceTimers[this.tguid][this.mguid]; }
  if (timers[guid]) { invoke(this.target, this.method, this.args); }
  delete timers[guid];
}

function scheduleOnce(queue, target, method, args) {
  var tguid = Ember.guidFor(target),
    mguid = Ember.guidFor(method),
    onceTimers = run.autorun().onceTimers,
    guid = onceTimers[tguid] && onceTimers[tguid][mguid],
    timer;

  if (guid && timers[guid]) {
    timers[guid].args = args; // replace args
  } else {
    timer = {
      target: target,
      method: method,
      args:   args,
      tguid:  tguid,
      mguid:  mguid
    };

    guid  = Ember.guidFor(timer);
    timers[guid] = timer;
    if (!onceTimers[tguid]) { onceTimers[tguid] = {}; }
    onceTimers[tguid][mguid] = guid; // so it isn't scheduled more than once

    run.schedule(queue, timer, invokeOnceTimer, guid, onceTimers);
  }

  return guid;
}

/**
  Schedules an item to run one time during the current RunLoop.  Calling
  this method with the same target/method combination will have no effect.

  Note that although you can pass optional arguments these will not be
  considered when looking for duplicates.  New arguments will replace previous
  calls.

      Ember.run(function(){
        var doFoo = function() { foo(); }
        Ember.run.once(myContext, doFoo);
        Ember.run.once(myContext, doFoo);
        // doFoo will only be executed once at the end of the RunLoop
      });

  @method once
  @param {Object} [target] target of method to invoke

  @param {Function|String} method The method to invoke.
    If you pass a string it will be resolved on the
    target at the time the method is invoked.

  @param {Object} [args*] Optional arguments to pass to the timeout.

  @return {Object} timer
*/
Ember.run.once = function(target, method) {
  return scheduleOnce('actions', target, method, slice.call(arguments, 2));
};

Ember.run.scheduleOnce = function(queue, target, method, args) {
  return scheduleOnce(queue, target, method, slice.call(arguments, 3));
};

var scheduledNext;
function invokeNextTimers() {
  scheduledNext = null;
  for(var key in timers) {
    if (!timers.hasOwnProperty(key)) { continue; }
    var timer = timers[key];
    if (timer.next) {
      delete timers[key];
      invoke(timer.target, timer.method, timer.args, 2);
    }
  }
}

/**
  Schedules an item to run after control has been returned to the system.
  This is often equivalent to calling setTimeout(function...,1).

      Ember.run.next(myContext, function(){
        // code to be executed in the next RunLoop, which will be scheduled after the current one
      });

  @method next
  @param {Object} [target] target of method to invoke

  @param {Function|String} method The method to invoke.
    If you pass a string it will be resolved on the
    target at the time the method is invoked.

  @param {Object} [args*] Optional arguments to pass to the timeout.

  @return {Object} timer
*/
Ember.run.next = function(target, method) {
  var guid,
      timer = {
        target: target,
        method: method,
        args: slice.call(arguments),
        next: true
      };

  guid = Ember.guidFor(timer);
  timers[guid] = timer;

  if (!scheduledNext) { scheduledNext = setTimeout(invokeNextTimers, 1); }
  return guid;
};

/**
  Cancels a scheduled item.  Must be a value returned by `Ember.run.later()`,
  `Ember.run.once()`, or `Ember.run.next()`.

      var runNext = Ember.run.next(myContext, function(){
        // will not be executed
      });
      Ember.run.cancel(runNext);

      var runLater = Ember.run.later(myContext, function(){
        // will not be executed
      }, 500);
      Ember.run.cancel(runLater);

      var runOnce = Ember.run.once(myContext, function(){
        // will not be executed
      });
      Ember.run.cancel(runOnce);

  @method cancel
  @param {Object} timer Timer object to cancel
  @return {void}
*/
Ember.run.cancel = function(timer) {
  delete timers[timer];
};

})();

(function() {
// Ember.Logger
// get, set, trySet
// guidFor, isArray, meta
// addObserver, removeObserver
// Ember.run.schedule
/**
@module ember-metal
*/

// ..........................................................
// CONSTANTS
//

/**
  Debug parameter you can turn on. This will log all bindings that fire to
  the console. This should be disabled in production code. Note that you
  can also enable this from the console or temporarily.

  @property LOG_BINDINGS
  @for Ember
  @type Boolean
  @default false
*/
Ember.LOG_BINDINGS = false || !!Ember.ENV.LOG_BINDINGS;

var get     = Ember.get,
    set     = Ember.set,
    guidFor = Ember.guidFor,
    isGlobalPath = Ember.isGlobalPath;

function getWithGlobals(obj, path) {
  return get(isGlobalPath(path) ? Ember.lookup : obj, path);
}

// ..........................................................
// BINDING
//

var Binding = function(toPath, fromPath) {
  this._direction = 'fwd';
  this._from = fromPath;
  this._to   = toPath;
  this._directionMap = Ember.Map.create();
};

/**
@class Binding
@namespace Ember
*/

Binding.prototype = {
  /**
    This copies the Binding so it can be connected to another object.

    @method copy
    @return {Ember.Binding}
  */
  copy: function () {
    var copy = new Binding(this._to, this._from);
    if (this._oneWay) { copy._oneWay = true; }
    return copy;
  },

  // ..........................................................
  // CONFIG
  //

  /**
    This will set "from" property path to the specified value. It will not
    attempt to resolve this property path to an actual object until you
    connect the binding.

    The binding will search for the property path starting at the root object
    you pass when you connect() the binding.  It follows the same rules as
    `get()` - see that method for more information.

    @method from
    @param {String} propertyPath the property path to connect to
    @return {Ember.Binding} receiver
  */
  from: function(path) {
    this._from = path;
    return this;
  },

  /**
    This will set the "to" property path to the specified value. It will not
    attempt to resolve this property path to an actual object until you
    connect the binding.

    The binding will search for the property path starting at the root object
    you pass when you connect() the binding.  It follows the same rules as
    `get()` - see that method for more information.

    @method to
    @param {String|Tuple} propertyPath A property path or tuple
    @return {Ember.Binding} this
  */
  to: function(path) {
    this._to = path;
    return this;
  },

  /**
    Configures the binding as one way. A one-way binding will relay changes
    on the "from" side to the "to" side, but not the other way around. This
    means that if you change the "to" side directly, the "from" side may have
    a different value.

    @method oneWay
    @return {Ember.Binding} receiver
  */
  oneWay: function() {
    this._oneWay = true;
    return this;
  },

  toString: function() {
    var oneWay = this._oneWay ? '[oneWay]' : '';
    return "Ember.Binding<" + guidFor(this) + ">(" + this._from + " -> " + this._to + ")" + oneWay;
  },

  // ..........................................................
  // CONNECT AND SYNC
  //

  /**
    Attempts to connect this binding instance so that it can receive and relay
    changes. This method will raise an exception if you have not set the
    from/to properties yet.

    @method connect
    @param {Object} obj The root object for this binding.
    @return {Ember.Binding} this
  */
  connect: function(obj) {
    Ember.assert('Must pass a valid object to Ember.Binding.connect()', !!obj);

    var fromPath = this._from, toPath = this._to;
    Ember.trySet(obj, toPath, getWithGlobals(obj, fromPath));

    // add an observer on the object to be notified when the binding should be updated
    Ember.addObserver(obj, fromPath, this, this.fromDidChange);

    // if the binding is a two-way binding, also set up an observer on the target
    if (!this._oneWay) { Ember.addObserver(obj, toPath, this, this.toDidChange); }

    this._readyToSync = true;

    return this;
  },

  /**
    Disconnects the binding instance. Changes will no longer be relayed. You
    will not usually need to call this method.

    @method disconnect
    @param {Object} obj The root object you passed when connecting the binding.
    @return {Ember.Binding} this
  */
  disconnect: function(obj) {
    Ember.assert('Must pass a valid object to Ember.Binding.disconnect()', !!obj);

    var twoWay = !this._oneWay;

    // remove an observer on the object so we're no longer notified of
    // changes that should update bindings.
    Ember.removeObserver(obj, this._from, this, this.fromDidChange);

    // if the binding is two-way, remove the observer from the target as well
    if (twoWay) { Ember.removeObserver(obj, this._to, this, this.toDidChange); }

    this._readyToSync = false; // disable scheduled syncs...
    return this;
  },

  // ..........................................................
  // PRIVATE
  //

  /* called when the from side changes */
  fromDidChange: function(target) {
    this._scheduleSync(target, 'fwd');
  },

  /* called when the to side changes */
  toDidChange: function(target) {
    this._scheduleSync(target, 'back');
  },

  _scheduleSync: function(obj, dir) {
    var directionMap = this._directionMap;
    var existingDir = directionMap.get(obj);

    // if we haven't scheduled the binding yet, schedule it
    if (!existingDir) {
      Ember.run.schedule('sync', this, this._sync, obj);
      directionMap.set(obj, dir);
    }

    // If both a 'back' and 'fwd' sync have been scheduled on the same object,
    // default to a 'fwd' sync so that it remains deterministic.
    if (existingDir === 'back' && dir === 'fwd') {
      directionMap.set(obj, 'fwd');
    }
  },

  _sync: function(obj) {
    var log = Ember.LOG_BINDINGS;

    // don't synchronize destroyed objects or disconnected bindings
    if (obj.isDestroyed || !this._readyToSync) { return; }

    // get the direction of the binding for the object we are
    // synchronizing from
    var directionMap = this._directionMap;
    var direction = directionMap.get(obj);

    var fromPath = this._from, toPath = this._to;

    directionMap.remove(obj);

    // if we're synchronizing from the remote object...
    if (direction === 'fwd') {
      var fromValue = getWithGlobals(obj, this._from);
      if (log) {
        Ember.Logger.log(' ', this.toString(), '->', fromValue, obj);
      }
      if (this._oneWay) {
        Ember.trySet(obj, toPath, fromValue);
      } else {
        Ember._suspendObserver(obj, toPath, this, this.toDidChange, function () {
          Ember.trySet(obj, toPath, fromValue);
        });
      }
    // if we're synchronizing *to* the remote object
    } else if (direction === 'back') {
      var toValue = get(obj, this._to);
      if (log) {
        Ember.Logger.log(' ', this.toString(), '<-', toValue, obj);
      }
      Ember._suspendObserver(obj, fromPath, this, this.fromDidChange, function () {
        Ember.trySet(Ember.isGlobalPath(fromPath) ? Ember.lookup : obj, fromPath, toValue);
      });
    }
  }

};

function mixinProperties(to, from) {
  for (var key in from) {
    if (from.hasOwnProperty(key)) {
      to[key] = from[key];
    }
  }
}

mixinProperties(Binding, {

  /**
    See {{#crossLink "Ember.Binding/from"}}{{/crossLink}}

    @method from
    @static
  */
  from: function() {
    var C = this, binding = new C();
    return binding.from.apply(binding, arguments);
  },

  /**
    See {{#crossLink "Ember.Binding/to"}}{{/crossLink}}

    @method to
    @static
  */
  to: function() {
    var C = this, binding = new C();
    return binding.to.apply(binding, arguments);
  },

  /**
    Creates a new Binding instance and makes it apply in a single direction.
    A one-way binding will relay changes on the "from" side object (supplied
    as the `from` argument) the "to" side, but not the other way around.
    This means that if you change the "to" side directly, the "from" side may have
    a different value.

    See {{#crossLink "Binding/oneWay"}}{{/crossLink}}

    @method oneWay
    @param {String} from from path.
    @param {Boolean} [flag] (Optional) passing nothing here will make the binding oneWay.  You can
      instead pass false to disable oneWay, making the binding two way again.
  */
  oneWay: function(from, flag) {
    var C = this, binding = new C(null, from);
    return binding.oneWay(flag);
  }

});

/**
  An Ember.Binding connects the properties of two objects so that whenever the
  value of one property changes, the other property will be changed also.

  ## Automatic Creation of Bindings with `/^*Binding/`-named Properties
  You do not usually create Binding objects directly but instead describe
  bindings in your class or object definition using automatic binding detection.

  Properties ending in a `Binding` suffix will be converted to Ember.Binding instances.
  The value of this property should be a string representing a path to another object or
  a custom binding instanced created using Binding helpers (see "Customizing Your Bindings"):

      valueBinding: "MyApp.someController.title"

  This will create a binding from `MyApp.someController.title` to the `value`
  property of your object instance automatically. Now the two values will be
  kept in sync.

  ## One Way Bindings

  One especially useful binding customization you can use is the `oneWay()`
  helper. This helper tells Ember that you are only interested in
  receiving changes on the object you are binding from. For example, if you
  are binding to a preference and you want to be notified if the preference
  has changed, but your object will not be changing the preference itself, you
  could do:

      bigTitlesBinding: Ember.Binding.oneWay("MyApp.preferencesController.bigTitles")

  This way if the value of MyApp.preferencesController.bigTitles changes the
  "bigTitles" property of your object will change also. However, if you
  change the value of your "bigTitles" property, it will not update the
  preferencesController.

  One way bindings are almost twice as fast to setup and twice as fast to
  execute because the binding only has to worry about changes to one side.

  You should consider using one way bindings anytime you have an object that
  may be created frequently and you do not intend to change a property; only
  to monitor it for changes. (such as in the example above).

  ## Adding Bindings Manually

  All of the examples above show you how to configure a custom binding, but
  the result of these customizations will be a binding template, not a fully
  active Binding instance. The binding will actually become active only when you
  instantiate the object the binding belongs to. It is useful however, to
  understand what actually happens when the binding is activated.

  For a binding to function it must have at least a "from" property and a "to"
  property. The from property path points to the object/key that you want to
  bind from while the to path points to the object/key you want to bind to.

  When you define a custom binding, you are usually describing the property
  you want to bind from (such as "MyApp.someController.value" in the examples
  above). When your object is created, it will automatically assign the value
  you want to bind "to" based on the name of your binding key. In the
  examples above, during init, Ember objects will effectively call
  something like this on your binding:

      binding = Ember.Binding.from(this.valueBinding).to("value");

  This creates a new binding instance based on the template you provide, and
  sets the to path to the "value" property of the new object. Now that the
  binding is fully configured with a "from" and a "to", it simply needs to be
  connected to become active. This is done through the connect() method:

      binding.connect(this);

  Note that when you connect a binding you pass the object you want it to be
  connected to.  This object will be used as the root for both the from and
  to side of the binding when inspecting relative paths.  This allows the
  binding to be automatically inherited by subclassed objects as well.

  Now that the binding is connected, it will observe both the from and to side
  and relay changes.

  If you ever needed to do so (you almost never will, but it is useful to
  understand this anyway), you could manually create an active binding by
  using the Ember.bind() helper method. (This is the same method used by
  to setup your bindings on objects):

      Ember.bind(MyApp.anotherObject, "value", "MyApp.someController.value");

  Both of these code fragments have the same effect as doing the most friendly
  form of binding creation like so:

      MyApp.anotherObject = Ember.Object.create({
        valueBinding: "MyApp.someController.value",

        // OTHER CODE FOR THIS OBJECT...

      });

  Ember's built in binding creation method makes it easy to automatically
  create bindings for you. You should always use the highest-level APIs
  available, even if you understand how it works underneath.

  @class Binding
  @namespace Ember
  @since Ember 0.9
*/
Ember.Binding = Binding;

/**
  Global helper method to create a new binding.  Just pass the root object
  along with a to and from path to create and connect the binding.

  @method bind
  @for Ember
  @param {Object} obj The root object of the transform.

  @param {String} to The path to the 'to' side of the binding.
    Must be relative to obj.

  @param {String} from The path to the 'from' side of the binding.
    Must be relative to obj or a global path.

  @return {Ember.Binding} binding instance
*/
Ember.bind = function(obj, to, from) {
  return new Ember.Binding(to, from).connect(obj);
};

/**
  @method oneWay
  @for Ember
  @param {Object} obj The root object of the transform.

  @param {String} to The path to the 'to' side of the binding.
    Must be relative to obj.

  @param {String} from The path to the 'from' side of the binding.
    Must be relative to obj or a global path.

  @return {Ember.Binding} binding instance
*/
Ember.oneWay = function(obj, to, from) {
  return new Ember.Binding(to, from).oneWay().connect(obj);
};

})();

(function() {
/**
@module ember-metal
*/

var Mixin, REQUIRED, Alias,
    classToString, superClassString,
    a_map = Ember.ArrayPolyfills.map,
    a_indexOf = Ember.ArrayPolyfills.indexOf,
    a_forEach = Ember.ArrayPolyfills.forEach,
    a_slice = [].slice,
    EMPTY_META = {}, // dummy for non-writable meta
    META_SKIP = { __emberproto__: true, __ember_count__: true },
    o_create = Ember.create,
    defineProperty = Ember.defineProperty,
    guidFor = Ember.guidFor;

function mixinsMeta(obj) {
  var m = Ember.meta(obj, true), ret = m.mixins;
  if (!ret) {
    ret = m.mixins = { __emberproto__: obj };
  } else if (ret.__emberproto__ !== obj) {
    ret = m.mixins = o_create(ret);
    ret.__emberproto__ = obj;
  }
  return ret;
}

function initMixin(mixin, args) {
  if (args && args.length > 0) {
    mixin.mixins = a_map.call(args, function(x) {
      if (x instanceof Mixin) { return x; }

      // Note: Manually setup a primitive mixin here.  This is the only
      // way to actually get a primitive mixin.  This way normal creation
      // of mixins will give you combined mixins...
      var mixin = new Mixin();
      mixin.properties = x;
      return mixin;
    });
  }
  return mixin;
}

function isMethod(obj) {
  return 'function' === typeof obj &&
         obj.isMethod !== false &&
         obj !== Boolean && obj !== Object && obj !== Number && obj !== Array && obj !== Date && obj !== String;
}

function mergeMixins(mixins, m, descs, values, base) {
  var len = mixins.length, idx, mixin, guid, props, value, key, ovalue, concats;

  function removeKeys(keyName) {
    delete descs[keyName];
    delete values[keyName];
  }

  for(idx=0; idx < len; idx++) {
    mixin = mixins[idx];
    Ember.assert('Expected hash or Mixin instance, got ' + Object.prototype.toString.call(mixin), typeof mixin === 'object' && mixin !== null && Object.prototype.toString.call(mixin) !== '[object Array]');

    if (mixin instanceof Mixin) {
      guid = guidFor(mixin);
      if (m[guid]) { continue; }
      m[guid] = mixin;
      props = mixin.properties;
    } else {
      props = mixin; // apply anonymous mixin properties
    }

    if (props) {
      // reset before adding each new mixin to pickup concats from previous
      concats = values.concatenatedProperties || base.concatenatedProperties;
      if (props.concatenatedProperties) {
        concats = concats ? concats.concat(props.concatenatedProperties) : props.concatenatedProperties;
      }

      for (key in props) {
        if (!props.hasOwnProperty(key)) { continue; }
        value = props[key];
        if (value instanceof Ember.Descriptor) {
          if (value === REQUIRED && descs[key]) { continue; }

          descs[key]  = value;
          values[key] = undefined;
        } else {
          // impl super if needed...
          if (isMethod(value)) {
            ovalue = descs[key] === undefined && values[key];
            if (!ovalue) { ovalue = base[key]; }
            if ('function' !== typeof ovalue) { ovalue = null; }
            if (ovalue) {
              var o = value.__ember_observes__, ob = value.__ember_observesBefore__;
              value = Ember.wrap(value, ovalue);
              value.__ember_observes__ = o;
              value.__ember_observesBefore__ = ob;
            }
          } else if ((concats && a_indexOf.call(concats, key) >= 0) || key === 'concatenatedProperties') {
            var baseValue = values[key] || base[key];
            value = baseValue ? baseValue.concat(value) : Ember.makeArray(value);
          }

          descs[key] = undefined;
          values[key] = value;
        }
      }

      // manually copy toString() because some JS engines do not enumerate it
      if (props.hasOwnProperty('toString')) {
        base.toString = props.toString;
      }

    } else if (mixin.mixins) {
      mergeMixins(mixin.mixins, m, descs, values, base);
      if (mixin._without) { a_forEach.call(mixin._without, removeKeys); }
    }
  }
}

function writableReq(obj) {
  var m = Ember.meta(obj), req = m.required;
  if (!req || req.__emberproto__ !== obj) {
    req = m.required = req ? o_create(req) : { __ember_count__: 0 };
    req.__emberproto__ = obj;
  }
  return req;
}

var IS_BINDING = Ember.IS_BINDING = /^.+Binding$/;

function detectBinding(obj, key, value, m) {
  if (IS_BINDING.test(key)) {
    var bindings = m.bindings;
    if (!bindings) {
      bindings = m.bindings = { __emberproto__: obj };
    } else if (bindings.__emberproto__ !== obj) {
      bindings = m.bindings = o_create(m.bindings);
      bindings.__emberproto__ = obj;
    }
    bindings[key] = value;
  }
}

function connectBindings(obj, m) {
  // TODO Mixin.apply(instance) should disconnect binding if exists
  var bindings = m.bindings, key, binding, to;
  if (bindings) {
    for (key in bindings) {
      binding = key !== '__emberproto__' && bindings[key];
      if (binding) {
        to = key.slice(0, -7); // strip Binding off end
        if (binding instanceof Ember.Binding) {
          binding = binding.copy(); // copy prototypes' instance
          binding.to(to);
        } else { // binding is string path
          binding = new Ember.Binding(to, binding);
        }
        binding.connect(obj);
        obj[key] = binding;
      }
    }
    // mark as applied
    m.bindings = { __emberproto__: obj };
  }
}

function finishPartial(obj, m) {
  connectBindings(obj, m || Ember.meta(obj));
  return obj;
}

function applyMixin(obj, mixins, partial) {
  var descs = {}, values = {}, m = Ember.meta(obj), req = m.required,
      key, value, desc, prevValue, paths, len, idx;

  // Go through all mixins and hashes passed in, and:
  //
  // * Handle concatenated properties
  // * Set up _super wrapping if necessary
  // * Set up computed property descriptors
  // * Copying `toString` in broken browsers
  mergeMixins(mixins, mixinsMeta(obj), descs, values, obj);

  for(key in values) {
    if (key === 'contructor') { continue; }
    if (!values.hasOwnProperty(key)) { continue; }

    desc = descs[key];
    value = values[key];

    if (desc === REQUIRED) {
      if (!(key in obj)) {
        Ember.assert('Required property not defined: '+key, !!partial);

        // for partial applies add to hash of required keys
        req = writableReq(obj);
        req.__ember_count__++;
        req[key] = true;
      }
    } else {
      while (desc && desc instanceof Alias) {
        var altKey = desc.methodName;
        if (descs[altKey] || values[altKey]) {
          value = values[altKey];
          desc  = descs[altKey];
        } else if (m.descs[altKey]) {
          desc  = m.descs[altKey];
          value = undefined;
        } else {
          desc = undefined;
          value = obj[altKey];
        }
      }

      if (desc === undefined && value === undefined) { continue; }

      prevValue = obj[key];

      if ('function' === typeof prevValue) {
        if ((paths = prevValue.__ember_observesBefore__)) {
          len = paths.length;
          for (idx=0; idx < len; idx++) {
            Ember.removeBeforeObserver(obj, paths[idx], null, key);
          }
        } else if ((paths = prevValue.__ember_observes__)) {
          len = paths.length;
          for (idx=0; idx < len; idx++) {
            Ember.removeObserver(obj, paths[idx], null, key);
          }
        }
      }

      detectBinding(obj, key, value, m);

      defineProperty(obj, key, desc, value, m);

      if ('function' === typeof value) {
        if (paths = value.__ember_observesBefore__) {
          len = paths.length;
          for (idx=0; idx < len; idx++) {
            Ember.addBeforeObserver(obj, paths[idx], null, key);
          }
        } else if (paths = value.__ember_observes__) {
          len = paths.length;
          for (idx=0; idx < len; idx++) {
            Ember.addObserver(obj, paths[idx], null, key);
          }
        }
      }

      if (req && req[key]) {
        req = writableReq(obj);
        req.__ember_count__--;
        req[key] = false;
      }
    }
  }

  if (!partial) { // don't apply to prototype
    finishPartial(obj, m);
  }

  // Make sure no required attrs remain
  if (!partial && req && req.__ember_count__>0) {
    var keys = [];
    for (key in req) {
      if (META_SKIP[key]) { continue; }
      keys.push(key);
    }
    // TODO: Remove surrounding if clause from production build
    Ember.assert('Required properties not defined: '+keys.join(','));
  }
  return obj;
}

/**
  @method mixin
  @for Ember
  @param obj
  @param mixins*
  @return obj
*/
Ember.mixin = function(obj) {
  var args = a_slice.call(arguments, 1);
  applyMixin(obj, args, false);
  return obj;
};

/**
  The `Ember.Mixin` class allows you to create mixins, whose properties can be
  added to other classes. For instance,

      App.Editable = Ember.Mixin.create({
        edit: function() {
          console.log('starting to edit');
          this.set('isEditing', true);
        },
        isEditing: false
      });

      // Mix mixins into classes by passing them as the first arguments to
      // .extend or .create.
      App.CommentView = Ember.View.extend(App.Editable, {
        template: Ember.Handlebars.compile('{{#if isEditing}}...{{else}}...{{/if}}')
      });

      commentView = App.CommentView.create();
      commentView.edit(); // => outputs 'starting to edit'

  Note that Mixins are created with `Ember.Mixin.create`, not
  `Ember.Mixin.extend`.

  @class Mixin
  @namespace Ember
*/
Ember.Mixin = function() { return initMixin(this, arguments); };

Mixin = Ember.Mixin;

Mixin._apply = applyMixin;

Mixin.applyPartial = function(obj) {
  var args = a_slice.call(arguments, 1);
  return applyMixin(obj, args, true);
};

Mixin.finishPartial = finishPartial;

/**
  @method create
  @static
  @param arguments*
*/
Mixin.create = function() {
  classToString.processed = false;
  var M = this;
  return initMixin(new M(), arguments);
};

var MixinPrototype = Mixin.prototype;

/**
  @method reopen
  @param arguments*
*/
MixinPrototype.reopen = function() {
  var mixin, tmp;

  if (this.properties) {
    mixin = Mixin.create();
    mixin.properties = this.properties;
    delete this.properties;
    this.mixins = [mixin];
  } else if (!this.mixins) {
    this.mixins = [];
  }

  var len = arguments.length, mixins = this.mixins, idx;

  for(idx=0; idx < len; idx++) {
    mixin = arguments[idx];
    Ember.assert('Expected hash or Mixin instance, got ' + Object.prototype.toString.call(mixin), typeof mixin === 'object' && mixin !== null && Object.prototype.toString.call(mixin) !== '[object Array]');

    if (mixin instanceof Mixin) {
      mixins.push(mixin);
    } else {
      tmp = Mixin.create();
      tmp.properties = mixin;
      mixins.push(tmp);
    }
  }

  return this;
};

/**
  @method apply
  @param obj
  @return applied object
*/
MixinPrototype.apply = function(obj) {
  return applyMixin(obj, [this], false);
};

MixinPrototype.applyPartial = function(obj) {
  return applyMixin(obj, [this], true);
};

function _detect(curMixin, targetMixin, seen) {
  var guid = guidFor(curMixin);

  if (seen[guid]) { return false; }
  seen[guid] = true;

  if (curMixin === targetMixin) { return true; }
  var mixins = curMixin.mixins, loc = mixins ? mixins.length : 0;
  while (--loc >= 0) {
    if (_detect(mixins[loc], targetMixin, seen)) { return true; }
  }
  return false;
}

/**
  @method detect
  @param obj
  @return {Boolean}
*/
MixinPrototype.detect = function(obj) {
  if (!obj) { return false; }
  if (obj instanceof Mixin) { return _detect(obj, this, {}); }
  var mixins = Ember.meta(obj, false).mixins;
  if (mixins) {
    return !!mixins[guidFor(this)];
  }
  return false;
};

MixinPrototype.without = function() {
  var ret = new Mixin(this);
  ret._without = a_slice.call(arguments);
  return ret;
};

function _keys(ret, mixin, seen) {
  if (seen[guidFor(mixin)]) { return; }
  seen[guidFor(mixin)] = true;

  if (mixin.properties) {
    var props = mixin.properties;
    for (var key in props) {
      if (props.hasOwnProperty(key)) { ret[key] = true; }
    }
  } else if (mixin.mixins) {
    a_forEach.call(mixin.mixins, function(x) { _keys(ret, x, seen); });
  }
}

MixinPrototype.keys = function() {
  var keys = {}, seen = {}, ret = [];
  _keys(keys, this, seen);
  for(var key in keys) {
    if (keys.hasOwnProperty(key)) { ret.push(key); }
  }
  return ret;
};

/* make Mixins have nice displayNames */

var NAME_KEY = Ember.GUID_KEY+'_name';
var get = Ember.get;

function processNames(paths, root, seen) {
  var idx = paths.length;
  for(var key in root) {
    if (!root.hasOwnProperty || !root.hasOwnProperty(key)) { continue; }
    var obj = root[key];
    paths[idx] = key;

    if (obj && obj.toString === classToString) {
      obj[NAME_KEY] = paths.join('.');
    } else if (obj && get(obj, 'isNamespace')) {
      if (seen[guidFor(obj)]) { continue; }
      seen[guidFor(obj)] = true;
      processNames(paths, obj, seen);
    }
  }
  paths.length = idx; // cut out last item
}

function findNamespaces() {
  var Namespace = Ember.Namespace, lookup = Ember.lookup, obj, isNamespace;

  if (Namespace.PROCESSED) { return; }

  for (var prop in lookup) {
    //  get(window.globalStorage, 'isNamespace') would try to read the storage for domain isNamespace and cause exception in Firefox.
    // globalStorage is a storage obsoleted by the WhatWG storage specification. See https://developer.mozilla.org/en/DOM/Storage#globalStorage
    if (prop === "globalStorage" && lookup.StorageList && lookup.globalStorage instanceof lookup.StorageList) { continue; }
    // Unfortunately, some versions of IE don't support window.hasOwnProperty
    if (lookup.hasOwnProperty && !lookup.hasOwnProperty(prop)) { continue; }

    // At times we are not allowed to access certain properties for security reasons.
    // There are also times where even if we can access them, we are not allowed to access their properties.
    try {
      obj = Ember.lookup[prop];
      isNamespace = obj && get(obj, 'isNamespace');
    } catch (e) {
      continue;
    }

    if (isNamespace) {
      Ember.deprecate("Namespaces should not begin with lowercase.", /^[A-Z]/.test(prop));
      obj[NAME_KEY] = prop;
    }
  }
}

/**
  @private
  @method identifyNamespaces
  @for Ember
*/
Ember.identifyNamespaces = findNamespaces;

superClassString = function(mixin) {
  var superclass = mixin.superclass;
  if (superclass) {
    if (superclass[NAME_KEY]) { return superclass[NAME_KEY]; }
    else { return superClassString(superclass); }
  } else {
    return;
  }
};

classToString = function() {
  var Namespace = Ember.Namespace, namespace;

  // TODO: Namespace should really be in Metal
  if (Namespace) {
    if (!this[NAME_KEY] && !classToString.processed) {
      if (!Namespace.PROCESSED) {
        findNamespaces();
        Namespace.PROCESSED = true;
      }

      classToString.processed = true;

      var namespaces = Namespace.NAMESPACES;
      for (var i=0, l=namespaces.length; i<l; i++) {
        namespace = namespaces[i];
        processNames([namespace.toString()], namespace, {});
      }
    }
  }

  if (this[NAME_KEY]) {
    return this[NAME_KEY];
  } else {
    var str = superClassString(this);
    if (str) {
      return "(subclass of " + str + ")";
    } else {
      return "(unknown mixin)";
    }
  }
};

MixinPrototype.toString = classToString;

// returns the mixins currently applied to the specified object
// TODO: Make Ember.mixin
Mixin.mixins = function(obj) {
  var ret = [], mixins = Ember.meta(obj, false).mixins, key, mixin;
  if (mixins) {
    for(key in mixins) {
      if (META_SKIP[key]) { continue; }
      mixin = mixins[key];

      // skip primitive mixins since these are always anonymous
      if (!mixin.properties) { ret.push(mixins[key]); }
    }
  }
  return ret;
};

REQUIRED = new Ember.Descriptor();
REQUIRED.toString = function() { return '(Required Property)'; };

/**
  Denotes a required property for a mixin

  @method required
  @for Ember
*/
Ember.required = function() {
  return REQUIRED;
};

Alias = function(methodName) {
  this.methodName = methodName;
};
Alias.prototype = new Ember.Descriptor();

/**
  Makes a property or method available via an additional name.

      App.PaintSample = Ember.Object.extend({
        color: 'red',
        colour: Ember.alias('color'),
        name: function(){
          return "Zed";
        },
        moniker: Ember.alias("name")
      });
      var paintSample = App.PaintSample.create()
      paintSample.get('colour'); //=> 'red'
      paintSample.moniker(); //=> 'Zed'

  @method alias
  @for Ember
  @param {String} methodName name of the method or property to alias
  @return {Ember.Descriptor}
*/
Ember.alias = function(methodName) {
  return new Alias(methodName);
};

// ..........................................................
// OBSERVER HELPER
//

/**
  @method observer
  @for Ember
  @param {Function} func
  @param {String} propertyNames*
  @return func
*/
Ember.observer = function(func) {
  var paths = a_slice.call(arguments, 1);
  func.__ember_observes__ = paths;
  return func;
};

// If observers ever become asynchronous, Ember.immediateObserver
// must remain synchronous.
/**
  @method immediateObserver
  @for Ember
  @param {Function} func
  @param {String} propertyNames*
  @return func
*/
Ember.immediateObserver = function() {
  for (var i=0, l=arguments.length; i<l; i++) {
    var arg = arguments[i];
    Ember.assert("Immediate observers must observe internal properties only, not properties on other objects.", typeof arg !== "string" || arg.indexOf('.') === -1);
  }

  return Ember.observer.apply(this, arguments);
};

/**
  @method beforeObserver
  @for Ember
  @param {Function} func
  @param {String} propertyNames*
  @return func
*/
Ember.beforeObserver = function(func) {
  var paths = a_slice.call(arguments, 1);
  func.__ember_observesBefore__ = paths;
  return func;
};

})();

(function() {
/**
Ember Metal

@module ember
@submodule ember-metal
*/

})();

(function() {
/*globals ENV */
/**
@module ember
@submodule ember-runtime
*/

var indexOf = Ember.EnumerableUtils.indexOf;

// ........................................
// TYPING & ARRAY MESSAGING
//

var TYPE_MAP = {};
var t = "Boolean Number String Function Array Date RegExp Object".split(" ");
Ember.ArrayPolyfills.forEach.call(t, function(name) {
  TYPE_MAP[ "[object " + name + "]" ] = name.toLowerCase();
});

var toString = Object.prototype.toString;

/**
  Returns a consistent type for the passed item.

  Use this instead of the built-in `typeof` to get the type of an item.
  It will return the same result across all browsers and includes a bit
  more detail.  Here is what will be returned:

      | Return Value  | Meaning                                              |
      |---------------|------------------------------------------------------|
      | 'string'      | String primitive                                     |
      | 'number'      | Number primitive                                     |
      | 'boolean'     | Boolean primitive                                    |
      | 'null'        | Null value                                           |
      | 'undefined'   | Undefined value                                      |
      | 'function'    | A function                                           |
      | 'array'       | An instance of Array                                 |
      | 'class'       | A Ember class (created using Ember.Object.extend())  |
      | 'instance'    | A Ember object instance                              |
      | 'error'       | An instance of the Error object                      |
      | 'object'      | A JavaScript object not inheriting from Ember.Object |

  Examples:

      Ember.typeOf();                      => 'undefined'
      Ember.typeOf(null);                  => 'null'
      Ember.typeOf(undefined);             => 'undefined'
      Ember.typeOf('michael');             => 'string'
      Ember.typeOf(101);                   => 'number'
      Ember.typeOf(true);                  => 'boolean'
      Ember.typeOf(Ember.makeArray);       => 'function'
      Ember.typeOf([1,2,90]);              => 'array'
      Ember.typeOf(Ember.Object.extend()); => 'class'
      Ember.typeOf(Ember.Object.create()); => 'instance'
      Ember.typeOf(new Error('teamocil')); => 'error'

      // "normal" JavaScript object
      Ember.typeOf({a: 'b'});              => 'object'

  @method typeOf
  @for Ember
  @param item {Object} the item to check
  @return {String} the type
*/
Ember.typeOf = function(item) {
  var ret;

  ret = (item === null || item === undefined) ? String(item) : TYPE_MAP[toString.call(item)] || 'object';

  if (ret === 'function') {
    if (Ember.Object && Ember.Object.detect(item)) ret = 'class';
  } else if (ret === 'object') {
    if (item instanceof Error) ret = 'error';
    else if (Ember.Object && item instanceof Ember.Object) ret = 'instance';
    else ret = 'object';
  }

  return ret;
};

/**
  Returns true if the passed value is null or undefined.  This avoids errors
  from JSLint complaining about use of ==, which can be technically
  confusing.

      Ember.none();             => true
      Ember.none(null);         => true
      Ember.none(undefined);    => true
      Ember.none('');           => false
      Ember.none([]);           => false
      Ember.none(function(){}); => false

  @method none
  @for Ember
  @param {Object} obj Value to test
  @return {Boolean}
*/
Ember.none = function(obj) {
  return obj === null || obj === undefined;
};

/**
  Verifies that a value is null or an empty string | array | function.

  Constrains the rules on `Ember.none` by returning false for empty
  string and empty arrays.

      Ember.empty();               => true
      Ember.empty(null);           => true
      Ember.empty(undefined);      => true
      Ember.empty('');             => true
      Ember.empty([]);             => true
      Ember.empty('tobias fünke'); => false
      Ember.empty([0,1,2]);        => false

  @method empty
  @for Ember
  @param {Object} obj Value to test
  @return {Boolean}
*/
Ember.empty = function(obj) {
  return obj === null || obj === undefined || (obj.length === 0 && typeof obj !== 'function') || (typeof obj === 'object' && Ember.get(obj, 'length') === 0);
};

/**
 This will compare two javascript values of possibly different types.
 It will tell you which one is greater than the other by returning:

  - -1 if the first is smaller than the second,
  - 0 if both are equal,
  - 1 if the first is greater than the second.

 The order is calculated based on Ember.ORDER_DEFINITION, if types are different.
 In case they have the same type an appropriate comparison for this type is made.

    Ember.compare('hello', 'hello');  => 0
    Ember.compare('abc', 'dfg');      => -1
    Ember.compare(2, 1);              => 1

 @method compare
 @for Ember
 @param {Object} v First value to compare
 @param {Object} w Second value to compare
 @return {Number} -1 if v < w, 0 if v = w and 1 if v > w.
*/
Ember.compare = function compare(v, w) {
  if (v === w) { return 0; }

  var type1 = Ember.typeOf(v);
  var type2 = Ember.typeOf(w);

  var Comparable = Ember.Comparable;
  if (Comparable) {
    if (type1==='instance' && Comparable.detect(v.constructor)) {
      return v.constructor.compare(v, w);
    }

    if (type2 === 'instance' && Comparable.detect(w.constructor)) {
      return 1-w.constructor.compare(w, v);
    }
  }

  // If we haven't yet generated a reverse-mapping of Ember.ORDER_DEFINITION,
  // do so now.
  var mapping = Ember.ORDER_DEFINITION_MAPPING;
  if (!mapping) {
    var order = Ember.ORDER_DEFINITION;
    mapping = Ember.ORDER_DEFINITION_MAPPING = {};
    var idx, len;
    for (idx = 0, len = order.length; idx < len;  ++idx) {
      mapping[order[idx]] = idx;
    }

    // We no longer need Ember.ORDER_DEFINITION.
    delete Ember.ORDER_DEFINITION;
  }

  var type1Index = mapping[type1];
  var type2Index = mapping[type2];

  if (type1Index < type2Index) { return -1; }
  if (type1Index > type2Index) { return 1; }

  // types are equal - so we have to check values now
  switch (type1) {
    case 'boolean':
    case 'number':
      if (v < w) { return -1; }
      if (v > w) { return 1; }
      return 0;

    case 'string':
      var comp = v.localeCompare(w);
      if (comp < 0) { return -1; }
      if (comp > 0) { return 1; }
      return 0;

    case 'array':
      var vLen = v.length;
      var wLen = w.length;
      var l = Math.min(vLen, wLen);
      var r = 0;
      var i = 0;
      while (r === 0 && i < l) {
        r = compare(v[i],w[i]);
        i++;
      }
      if (r !== 0) { return r; }

      // all elements are equal now
      // shorter array should be ordered first
      if (vLen < wLen) { return -1; }
      if (vLen > wLen) { return 1; }
      // arrays are equal now
      return 0;

    case 'instance':
      if (Ember.Comparable && Ember.Comparable.detect(v)) {
        return v.compare(v, w);
      }
      return 0;

    case 'date':
      var vNum = v.getTime();
      var wNum = w.getTime();
      if (vNum < wNum) { return -1; }
      if (vNum > wNum) { return 1; }
      return 0;

    default:
      return 0;
  }
};

function _copy(obj, deep, seen, copies) {
  var ret, loc, key;

  // primitive data types are immutable, just return them.
  if ('object' !== typeof obj || obj===null) return obj;

  // avoid cyclical loops
  if (deep && (loc=indexOf(seen, obj))>=0) return copies[loc];

  Ember.assert('Cannot clone an Ember.Object that does not implement Ember.Copyable', !(obj instanceof Ember.Object) || (Ember.Copyable && Ember.Copyable.detect(obj)));

  // IMPORTANT: this specific test will detect a native array only.  Any other
  // object will need to implement Copyable.
  if (Ember.typeOf(obj) === 'array') {
    ret = obj.slice();
    if (deep) {
      loc = ret.length;
      while(--loc>=0) ret[loc] = _copy(ret[loc], deep, seen, copies);
    }
  } else if (Ember.Copyable && Ember.Copyable.detect(obj)) {
    ret = obj.copy(deep, seen, copies);
  } else {
    ret = {};
    for(key in obj) {
      if (!obj.hasOwnProperty(key)) continue;
      ret[key] = deep ? _copy(obj[key], deep, seen, copies) : obj[key];
    }
  }

  if (deep) {
    seen.push(obj);
    copies.push(ret);
  }

  return ret;
}

/**
  Creates a clone of the passed object. This function can take just about
  any type of object and create a clone of it, including primitive values
  (which are not actually cloned because they are immutable).

  If the passed object implements the clone() method, then this function
  will simply call that method and return the result.

  @method copy
  @for Ember
  @param {Object} object The object to clone
  @param {Boolean} deep If true, a deep copy of the object is made
  @return {Object} The cloned object
*/
Ember.copy = function(obj, deep) {
  // fast paths
  if ('object' !== typeof obj || obj===null) return obj; // can't copy primitives
  if (Ember.Copyable && Ember.Copyable.detect(obj)) return obj.copy(deep);
  return _copy(obj, deep, deep ? [] : null, deep ? [] : null);
};

/**
  Convenience method to inspect an object. This method will attempt to
  convert the object into a useful string description.

  @method inspect
  @for Ember
  @param {Object} obj The object you want to inspect.
  @return {String} A description of the object
*/
Ember.inspect = function(obj) {
  var v, ret = [];
  for(var key in obj) {
    if (obj.hasOwnProperty(key)) {
      v = obj[key];
      if (v === 'toString') { continue; } // ignore useless items
      if (Ember.typeOf(v) === 'function') { v = "function() { ... }"; }
      ret.push(key + ": " + v);
    }
  }
  return "{" + ret.join(" , ") + "}";
};

/**
  Compares two objects, returning true if they are logically equal.  This is
  a deeper comparison than a simple triple equal. For sets it will compare the
  internal objects.  For any other object that implements `isEqual()` it will
  respect that method.

      Ember.isEqual('hello', 'hello');  => true
      Ember.isEqual(1, 2);              => false
      Ember.isEqual([4,2], [4,2]);      => false

  @method isEqual
  @for Ember
  @param {Object} a first object to compare
  @param {Object} b second object to compare
  @return {Boolean}
*/
Ember.isEqual = function(a, b) {
  if (a && 'function'===typeof a.isEqual) return a.isEqual(b);
  return a === b;
};

// Used by Ember.compare
Ember.ORDER_DEFINITION = Ember.ENV.ORDER_DEFINITION || [
  'undefined',
  'null',
  'boolean',
  'number',
  'string',
  'array',
  'object',
  'instance',
  'function',
  'class',
  'date'
];

/**
  Returns all of the keys defined on an object or hash. This is useful
  when inspecting objects for debugging.  On browsers that support it, this
  uses the native Object.keys implementation.

  @method keys
  @for Ember
  @param {Object} obj
  @return {Array} Array containing keys of obj
*/
Ember.keys = Object.keys;

if (!Ember.keys) {
  Ember.keys = function(obj) {
    var ret = [];
    for(var key in obj) {
      if (obj.hasOwnProperty(key)) { ret.push(key); }
    }
    return ret;
  };
}

// ..........................................................
// ERROR
//

var errorProps = ['description', 'fileName', 'lineNumber', 'message', 'name', 'number', 'stack'];

/**
  A subclass of the JavaScript Error object for use in Ember.

  @class Error
  @namespace Ember
  @extends Error
  @constructor
*/
Ember.Error = function() {
  var tmp = Error.prototype.constructor.apply(this, arguments);

  // Unfortunately errors are not enumerable in Chrome (at least), so `for prop in tmp` doesn't work.
  for (var idx = 0; idx < errorProps.length; idx++) {
    this[errorProps[idx]] = tmp[errorProps[idx]];
  }
};

Ember.Error.prototype = Ember.create(Error.prototype);

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var STRING_DASHERIZE_REGEXP = (/[ _]/g);
var STRING_DASHERIZE_CACHE = {};
var STRING_DECAMELIZE_REGEXP = (/([a-z])([A-Z])/g);
var STRING_CAMELIZE_REGEXP = (/(\-|_|\s)+(.)?/g);
var STRING_UNDERSCORE_REGEXP_1 = (/([a-z\d])([A-Z]+)/g);
var STRING_UNDERSCORE_REGEXP_2 = (/\-|\s+/g);

/**
  Defines the hash of localized strings for the current language.  Used by
  the `Ember.String.loc()` helper.  To localize, add string values to this
  hash.

  @property STRINGS
  @for Ember
  @type Hash
*/
Ember.STRINGS = {};

/**
  Defines string helper methods including string formatting and localization.
  Unless Ember.EXTEND_PROTOTYPES.String is false these methods will also be added
  to the String.prototype as well.

  @class String
  @namespace Ember
  @static
*/
Ember.String = {

  /**
    Apply formatting options to the string.  This will look for occurrences
    of %@ in your string and substitute them with the arguments you pass into
    this method.  If you want to control the specific order of replacement,
    you can add a number after the key as well to indicate which argument
    you want to insert.

    Ordered insertions are most useful when building loc strings where values
    you need to insert may appear in different orders.

        "Hello %@ %@".fmt('John', 'Doe') => "Hello John Doe"
        "Hello %@2, %@1".fmt('John', 'Doe') => "Hello Doe, John"

    @method fmt
    @param {Object...} [args]
    @return {String} formatted string
  */
  fmt: function(str, formats) {
    // first, replace any ORDERED replacements.
    var idx  = 0; // the current index for non-numerical replacements
    return str.replace(/%@([0-9]+)?/g, function(s, argIndex) {
      argIndex = (argIndex) ? parseInt(argIndex,0) - 1 : idx++ ;
      s = formats[argIndex];
      return ((s === null) ? '(null)' : (s === undefined) ? '' : s).toString();
    }) ;
  },

  /**
    Formats the passed string, but first looks up the string in the localized
    strings hash.  This is a convenient way to localize text.  See
    `Ember.String.fmt()` for more information on formatting.

    Note that it is traditional but not required to prefix localized string
    keys with an underscore or other character so you can easily identify
    localized strings.

        Ember.STRINGS = {
          '_Hello World': 'Bonjour le monde',
          '_Hello %@ %@': 'Bonjour %@ %@'
        };

        Ember.String.loc("_Hello World");
        => 'Bonjour le monde';

        Ember.String.loc("_Hello %@ %@", ["John", "Smith"]);
        => "Bonjour John Smith";

    @method loc
    @param {String} str The string to format
    @param {Array} formats Optional array of parameters to interpolate into string.
    @return {String} formatted string
  */
  loc: function(str, formats) {
    str = Ember.STRINGS[str] || str;
    return Ember.String.fmt(str, formats) ;
  },

  /**
    Splits a string into separate units separated by spaces, eliminating any
    empty strings in the process.  This is a convenience method for split that
    is mostly useful when applied to the String.prototype.

        Ember.String.w("alpha beta gamma").forEach(function(key) {
          console.log(key);
        });
        > alpha
        > beta
        > gamma

    @method w
    @param {String} str The string to split
    @return {String} split string
  */
  w: function(str) { return str.split(/\s+/); },

  /**
    Converts a camelized string into all lower case separated by underscores.

        'innerHTML'.decamelize()         => 'inner_html'
        'action_name'.decamelize()       => 'action_name'
        'css-class-name'.decamelize()    => 'css-class-name'
        'my favorite items'.decamelize() => 'my favorite items'

    @method decamelize
    @param {String} str The string to decamelize.
    @return {String} the decamelized string.
  */
  decamelize: function(str) {
    return str.replace(STRING_DECAMELIZE_REGEXP, '$1_$2').toLowerCase();
  },

  /**
    Replaces underscores or spaces with dashes.

        'innerHTML'.dasherize()         => 'inner-html'
        'action_name'.dasherize()       => 'action-name'
        'css-class-name'.dasherize()    => 'css-class-name'
        'my favorite items'.dasherize() => 'my-favorite-items'

    @method dasherize
    @param {String} str The string to dasherize.
    @return {String} the dasherized string.
  */
  dasherize: function(str) {
    var cache = STRING_DASHERIZE_CACHE,
        ret   = cache[str];

    if (ret) {
      return ret;
    } else {
      ret = Ember.String.decamelize(str).replace(STRING_DASHERIZE_REGEXP,'-');
      cache[str] = ret;
    }

    return ret;
  },

  /**
    Returns the lowerCaseCamel form of a string.

        'innerHTML'.camelize()         => 'innerHTML'
        'action_name'.camelize()       => 'actionName'
        'css-class-name'.camelize()    => 'cssClassName'
        'my favorite items'.camelize() => 'myFavoriteItems'

    @method camelize
    @param {String} str The string to camelize.
    @return {String} the camelized string.
  */
  camelize: function(str) {
    return str.replace(STRING_CAMELIZE_REGEXP, function(match, separator, chr) {
      return chr ? chr.toUpperCase() : '';
    });
  },

  /**
    Returns the UpperCamelCase form of a string.

        'innerHTML'.classify()         => 'InnerHTML'
        'action_name'.classify()       => 'ActionName'
        'css-class-name'.classify()    => 'CssClassName'
        'my favorite items'.classify() => 'MyFavoriteItems'

    @method classify
    @param {String} str the string to classify
    @return {String} the classified string
  */
  classify: function(str) {
    var camelized = Ember.String.camelize(str);
    return camelized.charAt(0).toUpperCase() + camelized.substr(1);
  },

  /**
    More general than decamelize. Returns the lower_case_and_underscored
    form of a string.

        'innerHTML'.underscore()         => 'inner_html'
        'action_name'.underscore()       => 'action_name'
        'css-class-name'.underscore()    => 'css_class_name'
        'my favorite items'.underscore() => 'my_favorite_items'

    @property underscore
    @param {String} str The string to underscore.
    @return {String} the underscored string.
  */
  underscore: function(str) {
    return str.replace(STRING_UNDERSCORE_REGEXP_1, '$1_$2').
      replace(STRING_UNDERSCORE_REGEXP_2, '_').toLowerCase();
  }
};

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var fmt = Ember.String.fmt,
    w   = Ember.String.w,
    loc = Ember.String.loc,
    camelize = Ember.String.camelize,
    decamelize = Ember.String.decamelize,
    dasherize = Ember.String.dasherize,
    underscore = Ember.String.underscore;

if (Ember.EXTEND_PROTOTYPES === true || Ember.EXTEND_PROTOTYPES.String) {

  /**
    See {{#crossLink "Ember.String/fmt"}}{{/crossLink}}

    @method fmt
    @for String
  */
  String.prototype.fmt = function() {
    return fmt(this, arguments);
  };

  /**
    See {{#crossLink "Ember.String/w"}}{{/crossLink}}

    @method w
    @for String
  */
  String.prototype.w = function() {
    return w(this);
  };

  /**
    See {{#crossLink "Ember.String/loc"}}{{/crossLink}}

    @method loc
    @for String
  */
  String.prototype.loc = function() {
    return loc(this, arguments);
  };

  /**
    See {{#crossLink "Ember.String/camelize"}}{{/crossLink}}

    @method camelize
    @for String
  */
  String.prototype.camelize = function() {
    return camelize(this);
  };

  /**
    See {{#crossLink "Ember.String/decamelize"}}{{/crossLink}}

    @method decamelize
    @for String
  */
  String.prototype.decamelize = function() {
    return decamelize(this);
  };

  /**
    See {{#crossLink "Ember.String/dasherize"}}{{/crossLink}}

    @method dasherize
    @for String
  */
  String.prototype.dasherize = function() {
    return dasherize(this);
  };

  /**
    See {{#crossLink "Ember.String/underscore"}}{{/crossLink}}

    @method underscore
    @for String
  */
  String.prototype.underscore = function() {
    return underscore(this);
  };

}

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var a_slice = Array.prototype.slice;

if (Ember.EXTEND_PROTOTYPES === true || Ember.EXTEND_PROTOTYPES.Function) {

  /**
    The `property` extension of Javascript's Function prototype is available
    when Ember.EXTEND_PROTOTYPES or Ember.EXTEND_PROTOTYPES.Function is true,
    which is the default.

    Computed properties allow you to treat a function like a property:

        MyApp.president = Ember.Object.create({
          firstName: "Barack",
          lastName: "Obama",

          fullName: function() {
            return this.get('firstName') + ' ' + this.get('lastName');

            // Call this flag to mark the function as a property
          }.property()
        });

        MyApp.president.get('fullName');    => "Barack Obama"

    Treating a function like a property is useful because they can work with
    bindings, just like any other property.

    Many computed properties have dependencies on other properties. For
    example, in the above example, the `fullName` property depends on
    `firstName` and `lastName` to determine its value. You can tell Ember.js
    about these dependencies like this:

        MyApp.president = Ember.Object.create({
          firstName: "Barack",
          lastName: "Obama",

          fullName: function() {
            return this.get('firstName') + ' ' + this.get('lastName');

            // Tell Ember.js that this computed property depends on firstName
            // and lastName
          }.property('firstName', 'lastName')
        });

    Make sure you list these dependencies so Ember.js knows when to update
    bindings that connect to a computed property. Changing a dependency
    will not immediately trigger an update of the computed property, but
    will instead clear the cache so that it is updated when the next `get`
    is called on the property.

    See {{#crossLink "Ember.ComputedProperty"}}{{/crossLink}},
      {{#crossLink "Ember/computed"}}{{/crossLink}}

    @method property
    @for Function
  */
  Function.prototype.property = function() {
    var ret = Ember.computed(this);
    return ret.property.apply(ret, arguments);
  };

  /**
    The `observes` extension of Javascript's Function prototype is available
    when Ember.EXTEND_PROTOTYPES or Ember.EXTEND_PROTOTYPES.Function is true,
    which is the default.

    You can observe property changes simply by adding the `observes`
    call to the end of your method declarations in classes that you write.
    For example:

        Ember.Object.create({
          valueObserver: function() {
            // Executes whenever the "value" property changes
          }.observes('value')
        });

    See {{#crossLink "Ember.Observable/observes"}}{{/crossLink}}

    @method observes
    @for Function
  */
  Function.prototype.observes = function() {
    this.__ember_observes__ = a_slice.call(arguments);
    return this;
  };

  /**
    The `observesBefore` extension of Javascript's Function prototype is available
    when Ember.EXTEND_PROTOTYPES or Ember.EXTEND_PROTOTYPES.Function is true,
    which is the default.

    You can get notified when a property changes is about to happen by
    by adding the `observesBefore` call to the end of your method
    declarations in classes that you write. For example:

        Ember.Object.create({
          valueObserver: function() {
            // Executes whenever the "value" property is about to change
          }.observesBefore('value')
        });

    See {{#crossLink "Ember.Observable/observesBefore"}}{{/crossLink}}

    @method observesBefore
    @for Function
  */
  Function.prototype.observesBefore = function() {
    this.__ember_observesBefore__ = a_slice.call(arguments);
    return this;
  };

}

})();

(function() {

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

// ..........................................................
// HELPERS
//

var get = Ember.get, set = Ember.set;
var a_slice = Array.prototype.slice;
var a_indexOf = Ember.EnumerableUtils.indexOf;

var contexts = [];

function popCtx() {
  return contexts.length===0 ? {} : contexts.pop();
}

function pushCtx(ctx) {
  contexts.push(ctx);
  return null;
}

function iter(key, value) {
  var valueProvided = arguments.length === 2;

  function i(item) {
    var cur = get(item, key);
    return valueProvided ? value===cur : !!cur;
  }
  return i ;
}

/**
  This mixin defines the common interface implemented by enumerable objects
  in Ember.  Most of these methods follow the standard Array iteration
  API defined up to JavaScript 1.8 (excluding language-specific features that
  cannot be emulated in older versions of JavaScript).

  This mixin is applied automatically to the Array class on page load, so you
  can use any of these methods on simple arrays.  If Array already implements
  one of these methods, the mixin will not override them.

  h3. Writing Your Own Enumerable

  To make your own custom class enumerable, you need two items:

  1. You must have a length property.  This property should change whenever
     the number of items in your enumerable object changes.  If you using this
     with an Ember.Object subclass, you should be sure to change the length
     property using set().

  2. If you must implement nextObject().  See documentation.

  Once you have these two methods implement, apply the Ember.Enumerable mixin
  to your class and you will be able to enumerate the contents of your object
  like any other collection.

  h3. Using Ember Enumeration with Other Libraries

  Many other libraries provide some kind of iterator or enumeration like
  facility.  This is often where the most common API conflicts occur.
  Ember's API is designed to be as friendly as possible with other
  libraries by implementing only methods that mostly correspond to the
  JavaScript 1.8 API.

  @class Enumerable
  @namespace Ember
  @extends Ember.Mixin
  @since Ember 0.9
*/
Ember.Enumerable = Ember.Mixin.create(
  /** @scope Ember.Enumerable.prototype */ {

  // compatibility
  isEnumerable: true,

  /**
    Implement this method to make your class enumerable.

    This method will be call repeatedly during enumeration.  The index value
    will always begin with 0 and increment monotonically.  You don't have to
    rely on the index value to determine what object to return, but you should
    always check the value and start from the beginning when you see the
    requested index is 0.

    The previousObject is the object that was returned from the last call
    to nextObject for the current iteration.  This is a useful way to
    manage iteration if you are tracing a linked list, for example.

    Finally the context parameter will always contain a hash you can use as
    a "scratchpad" to maintain any other state you need in order to iterate
    properly.  The context object is reused and is not reset between
    iterations so make sure you setup the context with a fresh state whenever
    the index parameter is 0.

    Generally iterators will continue to call nextObject until the index
    reaches the your current length-1.  If you run out of data before this
    time for some reason, you should simply return undefined.

    The default implementation of this method simply looks up the index.
    This works great on any Array-like objects.

    @method nextObject
    @param {Number} index the current index of the iteration
    @param {Object} previousObject the value returned by the last call to nextObject.
    @param {Object} context a context object you can use to maintain state.
    @return {Object} the next object in the iteration or undefined
  */
  nextObject: Ember.required(Function),

  /**
    Helper method returns the first object from a collection.  This is usually
    used by bindings and other parts of the framework to extract a single
    object if the enumerable contains only one item.

    If you override this method, you should implement it so that it will
    always return the same value each time it is called.  If your enumerable
    contains only one object, this method should always return that object.
    If your enumerable is empty, this method should return undefined.

        var arr = ["a", "b", "c"];
        arr.firstObject(); => "a"

        var arr = [];
        arr.firstObject(); => undefined

    @property firstObject
    @return {Object} the object or undefined
  */
  firstObject: Ember.computed(function() {
    if (get(this, 'length')===0) return undefined ;

    // handle generic enumerables
    var context = popCtx(), ret;
    ret = this.nextObject(0, null, context);
    pushCtx(context);
    return ret ;
  }).property('[]').cacheable(),

  /**
    Helper method returns the last object from a collection. If your enumerable
    contains only one object, this method should always return that object.
    If your enumerable is empty, this method should return undefined.

        var arr = ["a", "b", "c"];
        arr.lastObject(); => "c"

        var arr = [];
        arr.lastObject(); => undefined

    @property lastObject
    @return {Object} the last object or undefined
  */
  lastObject: Ember.computed(function() {
    var len = get(this, 'length');
    if (len===0) return undefined ;
    var context = popCtx(), idx=0, cur, last = null;
    do {
      last = cur;
      cur = this.nextObject(idx++, last, context);
    } while (cur !== undefined);
    pushCtx(context);
    return last;
  }).property('[]').cacheable(),

  /**
    Returns true if the passed object can be found in the receiver.  The
    default version will iterate through the enumerable until the object
    is found.  You may want to override this with a more efficient version.

        var arr = ["a", "b", "c"];
        arr.contains("a"); => true
        arr.contains("z"); => false

    @method contains
    @param {Object} obj The object to search for.
    @return {Boolean} true if object is found in enumerable.
  */
  contains: function(obj) {
    return this.find(function(item) { return item===obj; }) !== undefined;
  },

  /**
    Iterates through the enumerable, calling the passed function on each
    item. This method corresponds to the forEach() method defined in
    JavaScript 1.6.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    @method forEach
    @param {Function} callback The callback to execute
    @param {Object} [target] The target object to use
    @return {Object} receiver
  */
  forEach: function(callback, target) {
    if (typeof callback !== "function") throw new TypeError() ;
    var len = get(this, 'length'), last = null, context = popCtx();

    if (target === undefined) target = null;

    for(var idx=0;idx<len;idx++) {
      var next = this.nextObject(idx, last, context) ;
      callback.call(target, next, idx, this);
      last = next ;
    }
    last = null ;
    context = pushCtx(context);
    return this ;
  },

  /**
    Alias for mapProperty

    @method getEach
    @param {String} key name of the property
    @return {Array} The mapped array.
  */
  getEach: function(key) {
    return this.mapProperty(key);
  },

  /**
    Sets the value on the named property for each member. This is more
    efficient than using other methods defined on this helper. If the object
    implements Ember.Observable, the value will be changed to set(), otherwise
    it will be set directly. null objects are skipped.

    @method setEach
    @param {String} key The key to set
    @param {Object} value The object to set
    @return {Object} receiver
  */
  setEach: function(key, value) {
    return this.forEach(function(item) {
      set(item, key, value);
    });
  },

  /**
    Maps all of the items in the enumeration to another value, returning
    a new array. This method corresponds to map() defined in JavaScript 1.6.

    The callback method you provide should have the following signature (all
    parameters are optional):

        function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    It should return the mapped value.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    @method map
    @param {Function} callback The callback to execute
    @param {Object} [target] The target object to use
    @return {Array} The mapped array.
  */
  map: function(callback, target) {
    var ret = [];
    this.forEach(function(x, idx, i) {
      ret[idx] = callback.call(target, x, idx,i);
    });
    return ret ;
  },

  /**
    Similar to map, this specialized function returns the value of the named
    property on all items in the enumeration.

    @method mapProperty
    @param {String} key name of the property
    @return {Array} The mapped array.
  */
  mapProperty: function(key) {
    return this.map(function(next) {
      return get(next, key);
    });
  },

  /**
    Returns an array with all of the items in the enumeration that the passed
    function returns true for. This method corresponds to filter() defined in
    JavaScript 1.6.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    It should return the true to include the item in the results, false otherwise.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    @method filter
    @param {Function} callback The callback to execute
    @param {Object} [target] The target object to use
    @return {Array} A filtered array.
  */
  filter: function(callback, target) {
    var ret = [];
    this.forEach(function(x, idx, i) {
      if (callback.call(target, x, idx, i)) ret.push(x);
    });
    return ret ;
  },

  /**
    Returns an array with just the items with the matched property.  You
    can pass an optional second argument with the target value.  Otherwise
    this will match any property that evaluates to true.

    @method filterProperty
    @param {String} key the property to test
    @param {String} [value] optional value to test against.
    @return {Array} filtered array
  */
  filterProperty: function(key, value) {
    return this.filter(iter.apply(this, arguments));
  },

  /**
    Returns the first item in the array for which the callback returns true.
    This method works similar to the filter() method defined in JavaScript 1.6
    except that it will stop working on the array once a match is found.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    It should return the true to include the item in the results, false otherwise.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    @method find
    @param {Function} callback The callback to execute
    @param {Object} [target] The target object to use
    @return {Object} Found item or null.
  */
  find: function(callback, target) {
    var len = get(this, 'length') ;
    if (target === undefined) target = null;

    var last = null, next, found = false, ret ;
    var context = popCtx();
    for(var idx=0;idx<len && !found;idx++) {
      next = this.nextObject(idx, last, context) ;
      if (found = callback.call(target, next, idx, this)) ret = next ;
      last = next ;
    }
    next = last = null ;
    context = pushCtx(context);
    return ret ;
  },

  /**
    Returns the first item with a property matching the passed value.  You
    can pass an optional second argument with the target value.  Otherwise
    this will match any property that evaluates to true.

    This method works much like the more generic find() method.

    @method findProperty
    @param {String} key the property to test
    @param {String} [value] optional value to test against.
    @return {Object} found item or null
  */
  findProperty: function(key, value) {
    return this.find(iter.apply(this, arguments));
  },

  /**
    Returns true if the passed function returns true for every item in the
    enumeration. This corresponds with the every() method in JavaScript 1.6.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    It should return the true or false.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    Example Usage:

          if (people.every(isEngineer)) { Paychecks.addBigBonus(); }

    @method every
    @param {Function} callback The callback to execute
    @param {Object} [target] The target object to use
    @return {Boolean}
  */
  every: function(callback, target) {
    return !this.find(function(x, idx, i) {
      return !callback.call(target, x, idx, i);
    });
  },

  /**
    Returns true if the passed property resolves to true for all items in the
    enumerable.  This method is often simpler/faster than using a callback.

    @method everyProperty
    @param {String} key the property to test
    @param {String} [value] optional value to test against.
    @return {Array} filtered array
  */
  everyProperty: function(key, value) {
    return this.every(iter.apply(this, arguments));
  },

  /**
    Returns true if the passed function returns true for any item in the
    enumeration. This corresponds with the every() method in JavaScript 1.6.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    It should return the true to include the item in the results, false otherwise.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    Usage Example:

          if (people.some(isManager)) { Paychecks.addBiggerBonus(); }

    @method some
    @param {Function} callback The callback to execute
    @param {Object} [target] The target object to use
    @return {Array} A filtered array.
  */
  some: function(callback, target) {
    return !!this.find(function(x, idx, i) {
      return !!callback.call(target, x, idx, i);
    });
  },

  /**
    Returns true if the passed property resolves to true for any item in the
    enumerable.  This method is often simpler/faster than using a callback.

    @method someProperty
    @param {String} key the property to test
    @param {String} [value] optional value to test against.
    @return {Boolean} true
  */
  someProperty: function(key, value) {
    return this.some(iter.apply(this, arguments));
  },

  /**
    This will combine the values of the enumerator into a single value. It
    is a useful way to collect a summary value from an enumeration. This
    corresponds to the reduce() method defined in JavaScript 1.8.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(previousValue, item, index, enumerable);

    - *previousValue* is the value returned by the last call to the iterator.
    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    Return the new cumulative value.

    In addition to the callback you can also pass an initialValue. An error
    will be raised if you do not pass an initial value and the enumerator is
    empty.

    Note that unlike the other methods, this method does not allow you to
    pass a target object to set as this for the callback. It's part of the
    spec. Sorry.

    @method reduce
    @param {Function} callback The callback to execute
    @param {Object} initialValue Initial value for the reduce
    @param {String} reducerProperty internal use only.
    @return {Object} The reduced value.
  */
  reduce: function(callback, initialValue, reducerProperty) {
    if (typeof callback !== "function") { throw new TypeError(); }

    var ret = initialValue;

    this.forEach(function(item, i) {
      ret = callback.call(null, ret, item, i, this, reducerProperty);
    }, this);

    return ret;
  },

  /**
    Invokes the named method on every object in the receiver that
    implements it.  This method corresponds to the implementation in
    Prototype 1.6.

    @method invoke
    @param {String} methodName the name of the method
    @param {Object...} args optional arguments to pass as well.
    @return {Array} return values from calling invoke.
  */
  invoke: function(methodName) {
    var args, ret = [];
    if (arguments.length>1) args = a_slice.call(arguments, 1);

    this.forEach(function(x, idx) {
      var method = x && x[methodName];
      if ('function' === typeof method) {
        ret[idx] = args ? method.apply(x, args) : method.call(x);
      }
    }, this);

    return ret;
  },

  /**
    Simply converts the enumerable into a genuine array.  The order is not
    guaranteed.  Corresponds to the method implemented by Prototype.

    @method toArray
    @return {Array} the enumerable as an array.
  */
  toArray: function() {
    var ret = [];
    this.forEach(function(o, idx) { ret[idx] = o; });
    return ret ;
  },

  /**
    Returns a copy of the array with all null elements removed.

        var arr = ["a", null, "c", null];
        arr.compact(); => ["a", "c"]

    @method compact
    @return {Array} the array without null elements.
  */
  compact: function() { return this.without(null); },

  /**
    Returns a new enumerable that excludes the passed value.  The default
    implementation returns an array regardless of the receiver type unless
    the receiver does not contain the value.

        var arr = ["a", "b", "a", "c"];
        arr.without("a"); => ["b", "c"]

    @method without
    @param {Object} value
    @return {Ember.Enumerable}
  */
  without: function(value) {
    if (!this.contains(value)) return this; // nothing to do
    var ret = [] ;
    this.forEach(function(k) {
      if (k !== value) ret[ret.length] = k;
    }) ;
    return ret ;
  },

  /**
    Returns a new enumerable that contains only unique values.  The default
    implementation returns an array regardless of the receiver type.

        var arr = ["a", "a", "b", "b"];
        arr.uniq(); => ["a", "b"]

    @method uniq
    @return {Ember.Enumerable}
  */
  uniq: function() {
    var ret = [];
    this.forEach(function(k){
      if (a_indexOf(ret, k)<0) ret.push(k);
    });
    return ret;
  },

  /**
    This property will trigger anytime the enumerable's content changes.
    You can observe this property to be notified of changes to the enumerables
    content.

    For plain enumerables, this property is read only.  Ember.Array overrides
    this method.

    @property []
    @type Ember.Array
  */
  '[]': Ember.computed(function(key, value) {
    return this;
  }).property().cacheable(),

  // ..........................................................
  // ENUMERABLE OBSERVERS
  //

  /**
    Registers an enumerable observer.   Must implement Ember.EnumerableObserver
    mixin.

    @method addEnumerableObserver
    @param target {Object}
    @param opts {Hash}
  */
  addEnumerableObserver: function(target, opts) {
    var willChange = (opts && opts.willChange) || 'enumerableWillChange',
        didChange  = (opts && opts.didChange) || 'enumerableDidChange';

    var hasObservers = get(this, 'hasEnumerableObservers');
    if (!hasObservers) Ember.propertyWillChange(this, 'hasEnumerableObservers');
    Ember.addListener(this, '@enumerable:before', target, willChange);
    Ember.addListener(this, '@enumerable:change', target, didChange);
    if (!hasObservers) Ember.propertyDidChange(this, 'hasEnumerableObservers');
    return this;
  },

  /**
    Removes a registered enumerable observer.

    @method removeEnumerableObserver
    @param target {Object}
    @param [opts] {Hash}
  */
  removeEnumerableObserver: function(target, opts) {
    var willChange = (opts && opts.willChange) || 'enumerableWillChange',
        didChange  = (opts && opts.didChange) || 'enumerableDidChange';

    var hasObservers = get(this, 'hasEnumerableObservers');
    if (hasObservers) Ember.propertyWillChange(this, 'hasEnumerableObservers');
    Ember.removeListener(this, '@enumerable:before', target, willChange);
    Ember.removeListener(this, '@enumerable:change', target, didChange);
    if (hasObservers) Ember.propertyDidChange(this, 'hasEnumerableObservers');
    return this;
  },

  /**
    Becomes true whenever the array currently has observers watching changes
    on the array.

    @property hasEnumerableObservers
    @type Boolean
  */
  hasEnumerableObservers: Ember.computed(function() {
    return Ember.hasListeners(this, '@enumerable:change') || Ember.hasListeners(this, '@enumerable:before');
  }).property().cacheable(),

  /**
    Invoke this method just before the contents of your enumerable will
    change.  You can either omit the parameters completely or pass the objects
    to be removed or added if available or just a count.

    @method enumerableContentWillChange
    @param {Ember.Enumerable|Number} removing An enumerable of the objects to
      be removed or the number of items to be removed.
    @param {Ember.Enumerable|Number} adding An enumerable of the objects to be
      added or the number of items to be added.
    @chainable
  */
  enumerableContentWillChange: function(removing, adding) {

    var removeCnt, addCnt, hasDelta;

    if ('number' === typeof removing) removeCnt = removing;
    else if (removing) removeCnt = get(removing, 'length');
    else removeCnt = removing = -1;

    if ('number' === typeof adding) addCnt = adding;
    else if (adding) addCnt = get(adding,'length');
    else addCnt = adding = -1;

    hasDelta = addCnt<0 || removeCnt<0 || addCnt-removeCnt!==0;

    if (removing === -1) removing = null;
    if (adding   === -1) adding   = null;

    Ember.propertyWillChange(this, '[]');
    if (hasDelta) Ember.propertyWillChange(this, 'length');
    Ember.sendEvent(this, '@enumerable:before', [this, removing, adding]);

    return this;
  },

  /**
    Invoke this method when the contents of your enumerable has changed.
    This will notify any observers watching for content changes.  If your are
    implementing an ordered enumerable (such as an array), also pass the
    start and end values where the content changed so that it can be used to
    notify range observers.

    @method enumerableContentDidChange
    @param {Number} [start] optional start offset for the content change.
      For unordered enumerables, you should always pass -1.
    @param {Ember.Enumerable|Number} removing An enumerable of the objects to
      be removed or the number of items to be removed.
    @param {Ember.Enumerable|Number} adding  An enumerable of the objects to
      be added or the number of items to be added.
    @chainable
  */
  enumerableContentDidChange: function(removing, adding) {
    var notify = this.propertyDidChange, removeCnt, addCnt, hasDelta;

    if ('number' === typeof removing) removeCnt = removing;
    else if (removing) removeCnt = get(removing, 'length');
    else removeCnt = removing = -1;

    if ('number' === typeof adding) addCnt = adding;
    else if (adding) addCnt = get(adding, 'length');
    else addCnt = adding = -1;

    hasDelta = addCnt<0 || removeCnt<0 || addCnt-removeCnt!==0;

    if (removing === -1) removing = null;
    if (adding   === -1) adding   = null;

    Ember.sendEvent(this, '@enumerable:change', [this, removing, adding]);
    if (hasDelta) Ember.propertyDidChange(this, 'length');
    Ember.propertyDidChange(this, '[]');

    return this ;
  }

}) ;

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

// ..........................................................
// HELPERS
//

var get = Ember.get, set = Ember.set, meta = Ember.meta, map = Ember.EnumerableUtils.map, cacheFor = Ember.cacheFor;

function none(obj) { return obj===null || obj===undefined; }

// ..........................................................
// ARRAY
//
/**
  This module implements Observer-friendly Array-like behavior.  This mixin is
  picked up by the Array class as well as other controllers, etc. that want to
  appear to be arrays.

  Unlike Ember.Enumerable, this mixin defines methods specifically for
  collections that provide index-ordered access to their contents.  When you
  are designing code that needs to accept any kind of Array-like object, you
  should use these methods instead of Array primitives because these will
  properly notify observers of changes to the array.

  Although these methods are efficient, they do add a layer of indirection to
  your application so it is a good idea to use them only when you need the
  flexibility of using both true JavaScript arrays and "virtual" arrays such
  as controllers and collections.

  You can use the methods defined in this module to access and modify array
  contents in a KVO-friendly way.  You can also be notified whenever the
  membership if an array changes by changing the syntax of the property to
  .observes('*myProperty.[]') .

  To support Ember.Array in your own class, you must override two
  primitives to use it: replace() and objectAt().

  Note that the Ember.Array mixin also incorporates the Ember.Enumerable mixin.  All
  Ember.Array-like objects are also enumerable.

  @class Array
  @namespace Ember
  @extends Ember.Mixin
  @uses Ember.Enumerable
  @since Ember 0.9.0
*/
Ember.Array = Ember.Mixin.create(Ember.Enumerable, /** @scope Ember.Array.prototype */ {

  // compatibility
  isSCArray: true,

  /**
    Your array must support the length property. Your replace methods should
    set this property whenever it changes.

    @property {Number} length
  */
  length: Ember.required(),

  /**
    Returns the object at the given index. If the given index is negative or
    is greater or equal than the array length, returns `undefined`.

    This is one of the primitives you must implement to support `Ember.Array`.
    If your object supports retrieving the value of an array item using `get()`
    (i.e. `myArray.get(0)`), then you do not need to implement this method
    yourself.

        var arr = ['a', 'b', 'c', 'd'];
        arr.objectAt(0);  => "a"
        arr.objectAt(3);  => "d"
        arr.objectAt(-1); => undefined
        arr.objectAt(4);  => undefined
        arr.objectAt(5);  => undefined

    @method objectAt
    @param {Number} idx
      The index of the item to return.
  */
  objectAt: function(idx) {
    if ((idx < 0) || (idx>=get(this, 'length'))) return undefined ;
    return get(this, idx);
  },

  /**
    This returns the objects at the specified indexes, using `objectAt`.

        var arr = ['a', 'b', 'c', 'd'];
        arr.objectsAt([0, 1, 2]) => ["a", "b", "c"]
        arr.objectsAt([2, 3, 4]) => ["c", "d", undefined]

    @method objectsAt
    @param {Array} indexes
      An array of indexes of items to return.
   */
  objectsAt: function(indexes) {
    var self = this;
    return map(indexes, function(idx){ return self.objectAt(idx); });
  },

  // overrides Ember.Enumerable version
  nextObject: function(idx) {
    return this.objectAt(idx);
  },

  /**
    This is the handler for the special array content property.  If you get
    this property, it will return this.  If you set this property it a new
    array, it will replace the current content.

    This property overrides the default property defined in Ember.Enumerable.

    @property []
  */
  '[]': Ember.computed(function(key, value) {
    if (value !== undefined) this.replace(0, get(this, 'length'), value) ;
    return this ;
  }).property().cacheable(),

  firstObject: Ember.computed(function() {
    return this.objectAt(0);
  }).property().cacheable(),

  lastObject: Ember.computed(function() {
    return this.objectAt(get(this, 'length')-1);
  }).property().cacheable(),

  // optimized version from Enumerable
  contains: function(obj){
    return this.indexOf(obj) >= 0;
  },

  // Add any extra methods to Ember.Array that are native to the built-in Array.
  /**
    Returns a new array that is a slice of the receiver. This implementation
    uses the observable array methods to retrieve the objects for the new
    slice.

        var arr = ['red', 'green', 'blue'];
        arr.slice(0);      => ['red', 'green', 'blue']
        arr.slice(0, 2);   => ['red', 'green']
        arr.slice(1, 100); => ['green', 'blue']

    @method slice
    @param beginIndex {Integer} (Optional) index to begin slicing from.
    @param endIndex {Integer} (Optional) index to end the slice at.
    @return {Array} New array with specified slice
  */
  slice: function(beginIndex, endIndex) {
    var ret = [];
    var length = get(this, 'length') ;
    if (none(beginIndex)) beginIndex = 0 ;
    if (none(endIndex) || (endIndex > length)) endIndex = length ;
    while(beginIndex < endIndex) {
      ret[ret.length] = this.objectAt(beginIndex++) ;
    }
    return ret ;
  },

  /**
    Returns the index of the given object's first occurrence.
    If no startAt argument is given, the starting location to
    search is 0. If it's negative, will count backward from
    the end of the array. Returns -1 if no match is found.

        var arr = ["a", "b", "c", "d", "a"];
        arr.indexOf("a");      =>  0
        arr.indexOf("z");      => -1
        arr.indexOf("a", 2);   =>  4
        arr.indexOf("a", -1);  =>  4
        arr.indexOf("b", 3);   => -1
        arr.indexOf("a", 100); => -1

    @method indexOf
    @param {Object} object the item to search for
    @param {Number} startAt optional starting location to search, default 0
    @return {Number} index or -1 if not found
  */
  indexOf: function(object, startAt) {
    var idx, len = get(this, 'length');

    if (startAt === undefined) startAt = 0;
    if (startAt < 0) startAt += len;

    for(idx=startAt;idx<len;idx++) {
      if (this.objectAt(idx, true) === object) return idx ;
    }
    return -1;
  },

  /**
    Returns the index of the given object's last occurrence.
    If no startAt argument is given, the search starts from
    the last position. If it's negative, will count backward
    from the end of the array. Returns -1 if no match is found.

        var arr = ["a", "b", "c", "d", "a"];
        arr.lastIndexOf("a");      =>  4
        arr.lastIndexOf("z");      => -1
        arr.lastIndexOf("a", 2);   =>  0
        arr.lastIndexOf("a", -1);  =>  4
        arr.lastIndexOf("b", 3);   =>  1
        arr.lastIndexOf("a", 100); =>  4

    @method lastIndexOf
    @param {Object} object the item to search for
    @param {Number} startAt optional starting location to search, default 0
    @return {Number} index or -1 if not found
  */
  lastIndexOf: function(object, startAt) {
    var idx, len = get(this, 'length');

    if (startAt === undefined || startAt >= len) startAt = len-1;
    if (startAt < 0) startAt += len;

    for(idx=startAt;idx>=0;idx--) {
      if (this.objectAt(idx) === object) return idx ;
    }
    return -1;
  },

  // ..........................................................
  // ARRAY OBSERVERS
  //

  /**
    Adds an array observer to the receiving array.  The array observer object
    normally must implement two methods:

    * `arrayWillChange(start, removeCount, addCount)` - This method will be
      called just before the array is modified.
    * `arrayDidChange(start, removeCount, addCount)` - This method will be
      called just after the array is modified.

    Both callbacks will be passed the starting index of the change as well a
    a count of the items to be removed and added.  You can use these callbacks
    to optionally inspect the array during the change, clear caches, or do
    any other bookkeeping necessary.

    In addition to passing a target, you can also include an options hash
    which you can use to override the method names that will be invoked on the
    target.

    @method addArrayObserver
    @param {Object} target The observer object.
    @param {Hash} opts Optional hash of configuration options including
      willChange, didChange, and a context option.
    @return {Ember.Array} receiver
  */
  addArrayObserver: function(target, opts) {
    var willChange = (opts && opts.willChange) || 'arrayWillChange',
        didChange  = (opts && opts.didChange) || 'arrayDidChange';

    var hasObservers = get(this, 'hasArrayObservers');
    if (!hasObservers) Ember.propertyWillChange(this, 'hasArrayObservers');
    Ember.addListener(this, '@array:before', target, willChange);
    Ember.addListener(this, '@array:change', target, didChange);
    if (!hasObservers) Ember.propertyDidChange(this, 'hasArrayObservers');
    return this;
  },

  /**
    Removes an array observer from the object if the observer is current
    registered.  Calling this method multiple times with the same object will
    have no effect.

    @method removeArrayObserver
    @param {Object} target The object observing the array.
    @return {Ember.Array} receiver
  */
  removeArrayObserver: function(target, opts) {
    var willChange = (opts && opts.willChange) || 'arrayWillChange',
        didChange  = (opts && opts.didChange) || 'arrayDidChange';

    var hasObservers = get(this, 'hasArrayObservers');
    if (hasObservers) Ember.propertyWillChange(this, 'hasArrayObservers');
    Ember.removeListener(this, '@array:before', target, willChange);
    Ember.removeListener(this, '@array:change', target, didChange);
    if (hasObservers) Ember.propertyDidChange(this, 'hasArrayObservers');
    return this;
  },

  /**
    Becomes true whenever the array currently has observers watching changes
    on the array.

    @property Boolean
  */
  hasArrayObservers: Ember.computed(function() {
    return Ember.hasListeners(this, '@array:change') || Ember.hasListeners(this, '@array:before');
  }).property().cacheable(),

  /**
    If you are implementing an object that supports Ember.Array, call this
    method just before the array content changes to notify any observers and
    invalidate any related properties.  Pass the starting index of the change
    as well as a delta of the amounts to change.

    @method arrayContentWillChange
    @param {Number} startIdx The starting index in the array that will change.
    @param {Number} removeAmt The number of items that will be removed.  If you pass null assumes 0
    @param {Number} addAmt The number of items that will be added.  If you pass null assumes 0.
    @return {Ember.Array} receiver
  */
  arrayContentWillChange: function(startIdx, removeAmt, addAmt) {

    // if no args are passed assume everything changes
    if (startIdx===undefined) {
      startIdx = 0;
      removeAmt = addAmt = -1;
    } else {
      if (removeAmt === undefined) removeAmt=-1;
      if (addAmt    === undefined) addAmt=-1;
    }

    // Make sure the @each proxy is set up if anyone is observing @each
    if (Ember.isWatching(this, '@each')) { get(this, '@each'); }

    Ember.sendEvent(this, '@array:before', [this, startIdx, removeAmt, addAmt]);

    var removing, lim;
    if (startIdx>=0 && removeAmt>=0 && get(this, 'hasEnumerableObservers')) {
      removing = [];
      lim = startIdx+removeAmt;
      for(var idx=startIdx;idx<lim;idx++) removing.push(this.objectAt(idx));
    } else {
      removing = removeAmt;
    }

    this.enumerableContentWillChange(removing, addAmt);

    return this;
  },

  arrayContentDidChange: function(startIdx, removeAmt, addAmt) {

    // if no args are passed assume everything changes
    if (startIdx===undefined) {
      startIdx = 0;
      removeAmt = addAmt = -1;
    } else {
      if (removeAmt === undefined) removeAmt=-1;
      if (addAmt    === undefined) addAmt=-1;
    }

    var adding, lim;
    if (startIdx>=0 && addAmt>=0 && get(this, 'hasEnumerableObservers')) {
      adding = [];
      lim = startIdx+addAmt;
      for(var idx=startIdx;idx<lim;idx++) adding.push(this.objectAt(idx));
    } else {
      adding = addAmt;
    }

    this.enumerableContentDidChange(removeAmt, adding);
    Ember.sendEvent(this, '@array:change', [this, startIdx, removeAmt, addAmt]);

    var length      = get(this, 'length'),
        cachedFirst = cacheFor(this, 'firstObject'),
        cachedLast  = cacheFor(this, 'lastObject');
    if (this.objectAt(0) !== cachedFirst) {
      Ember.propertyWillChange(this, 'firstObject');
      Ember.propertyDidChange(this, 'firstObject');
    }
    if (this.objectAt(length-1) !== cachedLast) {
      Ember.propertyWillChange(this, 'lastObject');
      Ember.propertyDidChange(this, 'lastObject');
    }

    return this;
  },

  // ..........................................................
  // ENUMERATED PROPERTIES
  //

  /**
    Returns a special object that can be used to observe individual properties
    on the array.  Just get an equivalent property on this object and it will
    return an enumerable that maps automatically to the named key on the
    member objects.

    @property @each
  */
  '@each': Ember.computed(function() {
    if (!this.__each) this.__each = new Ember.EachProxy(this);
    return this.__each;
  }).property().cacheable()

}) ;

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

/**
  Implements some standard methods for comparing objects. Add this mixin to
  any class you create that can compare its instances.

  You should implement the compare() method.

  @class Comparable
  @namespace Ember
  @extends Ember.Mixin
  @since Ember 0.9
*/
Ember.Comparable = Ember.Mixin.create( /** @scope Ember.Comparable.prototype */{

  /**
    walk like a duck. Indicates that the object can be compared.

    @property isComparable
    @type Boolean
    @default true
  */
  isComparable: true,

  /**
    Override to return the result of the comparison of the two parameters. The
    compare method should return:

      - `-1` if `a < b`
      - `0` if `a == b`
      - `1` if `a > b`

    Default implementation raises an exception.

    @method compare
    @param a {Object} the first object to compare
    @param b {Object} the second object to compare
    @return {Integer} the result of the comparison
  */
  compare: Ember.required(Function)

});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set;

/**
  Implements some standard methods for copying an object.  Add this mixin to
  any object you create that can create a copy of itself.  This mixin is
  added automatically to the built-in array.

  You should generally implement the copy() method to return a copy of the
  receiver.

  Note that frozenCopy() will only work if you also implement Ember.Freezable.

  @class Copyable
  @namespace Ember
  @extends Ember.Mixin
  @since Ember 0.9
*/
Ember.Copyable = Ember.Mixin.create(
/** @scope Ember.Copyable.prototype */ {

  /**
    Override to return a copy of the receiver.  Default implementation raises
    an exception.

    @method copy
    @param deep {Boolean} if true, a deep copy of the object should be made
    @return {Object} copy of receiver
  */
  copy: Ember.required(Function),

  /**
    If the object implements Ember.Freezable, then this will return a new copy
    if the object is not frozen and the receiver if the object is frozen.

    Raises an exception if you try to call this method on a object that does
    not support freezing.

    You should use this method whenever you want a copy of a freezable object
    since a freezable object can simply return itself without actually
    consuming more memory.

    @method frozenCopy
    @return {Object} copy of receiver or receiver
  */
  frozenCopy: function() {
    if (Ember.Freezable && Ember.Freezable.detect(this)) {
      return get(this, 'isFrozen') ? this : this.copy().freeze();
    } else {
      throw new Error(Ember.String.fmt("%@ does not support freezing", [this]));
    }
  }
});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set;

/**
  The Ember.Freezable mixin implements some basic methods for marking an object
  as frozen. Once an object is frozen it should be read only. No changes
  may be made the internal state of the object.

  ## Enforcement

  To fully support freezing in your subclass, you must include this mixin and
  override any method that might alter any property on the object to instead
  raise an exception. You can check the state of an object by checking the
  isFrozen property.

  Although future versions of JavaScript may support language-level freezing
  object objects, that is not the case today. Even if an object is freezable,
  it is still technically possible to modify the object, even though it could
  break other parts of your application that do not expect a frozen object to
  change. It is, therefore, very important that you always respect the
  isFrozen property on all freezable objects.

  ## Example Usage

  The example below shows a simple object that implement the Ember.Freezable
  protocol.

        Contact = Ember.Object.extend(Ember.Freezable, {

          firstName: null,

          lastName: null,

          // swaps the names
          swapNames: function() {
            if (this.get('isFrozen')) throw Ember.FROZEN_ERROR;
            var tmp = this.get('firstName');
            this.set('firstName', this.get('lastName'));
            this.set('lastName', tmp);
            return this;
          }

        });

        c = Context.create({ firstName: "John", lastName: "Doe" });
        c.swapNames();  => returns c
        c.freeze();
        c.swapNames();  => EXCEPTION

  ## Copying

  Usually the Ember.Freezable protocol is implemented in cooperation with the
  Ember.Copyable protocol, which defines a frozenCopy() method that will return
  a frozen object, if the object implements this method as well.

  @class Freezable
  @namespace Ember
  @extends Ember.Mixin
  @since Ember 0.9
*/
Ember.Freezable = Ember.Mixin.create(
/** @scope Ember.Freezable.prototype */ {

  /**
    Set to true when the object is frozen.  Use this property to detect whether
    your object is frozen or not.

    @property isFrozen
    @type Boolean
  */
  isFrozen: false,

  /**
    Freezes the object.  Once this method has been called the object should
    no longer allow any properties to be edited.

    @method freeze
    @return {Object} receiver
  */
  freeze: function() {
    if (get(this, 'isFrozen')) return this;
    set(this, 'isFrozen', true);
    return this;
  }

});

Ember.FROZEN_ERROR = "Frozen object cannot be modified.";

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var forEach = Ember.EnumerableUtils.forEach;

/**
  This mixin defines the API for modifying generic enumerables.  These methods
  can be applied to an object regardless of whether it is ordered or
  unordered.

  Note that an Enumerable can change even if it does not implement this mixin.
  For example, a MappedEnumerable cannot be directly modified but if its
  underlying enumerable changes, it will change also.

  ## Adding Objects

  To add an object to an enumerable, use the addObject() method.  This
  method will only add the object to the enumerable if the object is not
  already present and the object if of a type supported by the enumerable.

      set.addObject(contact);

  ## Removing Objects

  To remove an object form an enumerable, use the removeObject() method.  This
  will only remove the object if it is already in the enumerable, otherwise
  this method has no effect.

      set.removeObject(contact);

  ## Implementing In Your Own Code

  If you are implementing an object and want to support this API, just include
  this mixin in your class and implement the required methods.  In your unit
  tests, be sure to apply the Ember.MutableEnumerableTests to your object.

  @class MutableEnumerable
  @namespace Ember
  @extends Ember.Mixin
  @uses Ember.Enumerable
*/
Ember.MutableEnumerable = Ember.Mixin.create(Ember.Enumerable,
  /** @scope Ember.MutableEnumerable.prototype */ {

  /**
    __Required.__ You must implement this method to apply this mixin.

    Attempts to add the passed object to the receiver if the object is not
    already present in the collection. If the object is present, this method
    has no effect.

    If the passed object is of a type not supported by the receiver
    then this method should raise an exception.

    @method addObject
    @param {Object} object The object to add to the enumerable.
    @return {Object} the passed object
  */
  addObject: Ember.required(Function),

  /**
    Adds each object in the passed enumerable to the receiver.

    @method addObjects
    @param {Ember.Enumerable} objects the objects to add.
    @return {Object} receiver
  */
  addObjects: function(objects) {
    Ember.beginPropertyChanges(this);
    forEach(objects, function(obj) { this.addObject(obj); }, this);
    Ember.endPropertyChanges(this);
    return this;
  },

  /**
    __Required.__ You must implement this method to apply this mixin.

    Attempts to remove the passed object from the receiver collection if the
    object is in present in the collection.  If the object is not present,
    this method has no effect.

    If the passed object is of a type not supported by the receiver
    then this method should raise an exception.

    @method removeObject
    @param {Object} object The object to remove from the enumerable.
    @return {Object} the passed object
  */
  removeObject: Ember.required(Function),

  /**
    Removes each objects in the passed enumerable from the receiver.

    @method removeObjects
    @param {Ember.Enumerable} objects the objects to remove
    @return {Object} receiver
  */
  removeObjects: function(objects) {
    Ember.beginPropertyChanges(this);
    forEach(objects, function(obj) { this.removeObject(obj); }, this);
    Ember.endPropertyChanges(this);
    return this;
  }

});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/
// ..........................................................
// CONSTANTS
//

var OUT_OF_RANGE_EXCEPTION = "Index out of range" ;
var EMPTY = [];

// ..........................................................
// HELPERS
//

var get = Ember.get, set = Ember.set, forEach = Ember.EnumerableUtils.forEach;

/**
  This mixin defines the API for modifying array-like objects.  These methods
  can be applied only to a collection that keeps its items in an ordered set.

  Note that an Array can change even if it does not implement this mixin.
  For example, one might implement a SparseArray that cannot be directly
  modified, but if its underlying enumerable changes, it will change also.

  @class MutableArray
  @namespace Ember
  @extends Ember.Mixin
  @uses Ember.Array
  @uses Ember.MutableEnumerable
*/
Ember.MutableArray = Ember.Mixin.create(Ember.Array, Ember.MutableEnumerable,
  /** @scope Ember.MutableArray.prototype */ {

  /**
    __Required.__ You must implement this method to apply this mixin.

    This is one of the primitives you must implement to support Ember.Array.  You
    should replace amt objects started at idx with the objects in the passed
    array.  You should also call this.enumerableContentDidChange() ;

    @method replace
    @param {Number} idx Starting index in the array to replace.  If idx >= length,
      then append to the end of the array.
    @param {Number} amt Number of elements that should be removed from the array,
      starting at *idx*.
    @param {Array} objects An array of zero or more objects that should be inserted
      into the array at *idx*
  */
  replace: Ember.required(),

  /**
    Remove all elements from self. This is useful if you
    want to reuse an existing array without having to recreate it.

        var colors = ["red", "green", "blue"];
        color.length();  => 3
        colors.clear();  => []
        colors.length(); => 0

    @method clear
    @return {Ember.Array} An empty Array.
  */
  clear: function () {
    var len = get(this, 'length');
    if (len === 0) return this;
    this.replace(0, len, EMPTY);
    return this;
  },

  /**
    This will use the primitive replace() method to insert an object at the
    specified index.

        var colors = ["red", "green", "blue"];
        colors.insertAt(2, "yellow"); => ["red", "green", "yellow", "blue"]
        colors.insertAt(5, "orange"); => Error: Index out of range

    @method insertAt
    @param {Number} idx index of insert the object at.
    @param {Object} object object to insert
  */
  insertAt: function(idx, object) {
    if (idx > get(this, 'length')) throw new Error(OUT_OF_RANGE_EXCEPTION) ;
    this.replace(idx, 0, [object]) ;
    return this ;
  },

  /**
    Remove an object at the specified index using the replace() primitive
    method.  You can pass either a single index, or a start and a length.

    If you pass a start and length that is beyond the
    length this method will throw an Ember.OUT_OF_RANGE_EXCEPTION

        var colors = ["red", "green", "blue", "yellow", "orange"];
        colors.removeAt(0); => ["green", "blue", "yellow", "orange"]
        colors.removeAt(2, 2); => ["green", "blue"]
        colors.removeAt(4, 2); => Error: Index out of range

    @method removeAt
    @param {Number} start index, start of range
    @param {Number} len length of passing range
    @return {Object} receiver
  */
  removeAt: function(start, len) {
    if ('number' === typeof start) {

      if ((start < 0) || (start >= get(this, 'length'))) {
        throw new Error(OUT_OF_RANGE_EXCEPTION);
      }

      // fast case
      if (len === undefined) len = 1;
      this.replace(start, len, EMPTY);
    }

    return this ;
  },

  /**
    Push the object onto the end of the array.  Works just like push() but it
    is KVO-compliant.

        var colors = ["red", "green", "blue"];
        colors.pushObject("black"); => ["red", "green", "blue", "black"]
        colors.pushObject(["yellow", "orange"]); => ["red", "green", "blue", "black", ["yellow", "orange"]]

    @method pushObject
    @param {anything} obj object to push
  */
  pushObject: function(obj) {
    this.insertAt(get(this, 'length'), obj) ;
    return obj ;
  },

  /**
    Add the objects in the passed numerable to the end of the array.  Defers
    notifying observers of the change until all objects are added.

        var colors = ["red", "green", "blue"];
        colors.pushObjects("black"); => ["red", "green", "blue", "black"]
        colors.pushObjects(["yellow", "orange"]); => ["red", "green", "blue", "black", "yellow", "orange"]

    @method pushObjects
    @param {Ember.Enumerable} objects the objects to add
    @return {Ember.Array} receiver
  */
  pushObjects: function(objects) {
    this.replace(get(this, 'length'), 0, objects);
    return this;
  },

  /**
    Pop object from array or nil if none are left.  Works just like pop() but
    it is KVO-compliant.

        var colors = ["red", "green", "blue"];
        colors.popObject(); => "blue"
        console.log(colors); => ["red", "green"]

    @method popObject
    @return object
  */
  popObject: function() {
    var len = get(this, 'length') ;
    if (len === 0) return null ;

    var ret = this.objectAt(len-1) ;
    this.removeAt(len-1, 1) ;
    return ret ;
  },

  /**
    Shift an object from start of array or nil if none are left.  Works just
    like shift() but it is KVO-compliant.

        var colors = ["red", "green", "blue"];
        colors.shiftObject(); => "red"
        console.log(colors); => ["green", "blue"]

    @method shiftObject
    @return object
  */
  shiftObject: function() {
    if (get(this, 'length') === 0) return null ;
    var ret = this.objectAt(0) ;
    this.removeAt(0) ;
    return ret ;
  },

  /**
    Unshift an object to start of array.  Works just like unshift() but it is
    KVO-compliant.

        var colors = ["red", "green", "blue"];
        colors.unshiftObject("yellow"); => ["yellow", "red", "green", "blue"]
        colors.unshiftObject(["black", "white"]); => [["black", "white"], "yellow", "red", "green", "blue"]

    @method unshiftObject
    @param {anything} obj object to unshift
  */
  unshiftObject: function(obj) {
    this.insertAt(0, obj) ;
    return obj ;
  },

  /**
    Adds the named objects to the beginning of the array.  Defers notifying
    observers until all objects have been added.

        var colors = ["red", "green", "blue"];
        colors.unshiftObjects(["black", "white"]); => ["black", "white", "red", "green", "blue"]
        colors.unshiftObjects("yellow"); => Type Error: 'undefined' is not a function

    @method unshiftObjects
    @param {Ember.Enumerable} objects the objects to add
    @return {Ember.Array} receiver
  */
  unshiftObjects: function(objects) {
    this.replace(0, 0, objects);
    return this;
  },

  /**
    Reverse objects in the array.  Works just like reverse() but it is
    KVO-compliant.

    @method reverseObjects
    @return {Ember.Array} receiver
   */
  reverseObjects: function() {
    var len = get(this, 'length');
    if (len === 0) return this;
    var objects = this.toArray().reverse();
    this.replace(0, len, objects);
    return this;
  },

  /**
    Replace all the the receiver's content with content of the argument.
    If argument is an empty array receiver will be cleared.

        var colors = ["red", "green", "blue"];
        colors.setObjects(["black", "white"]); => ["black", "white"]
        colors.setObjects([]); => []

    @method setObjects
    @param {Ember.Array} objects array whose content will be used for replacing
        the content of the receiver
    @return {Ember.Array} receiver with the new content
   */
  setObjects: function(objects) {
    if (objects.length === 0) return this.clear();

    var len = get(this, 'length');
    this.replace(0, len, objects);
    return this;
  },

  // ..........................................................
  // IMPLEMENT Ember.MutableEnumerable
  //

  removeObject: function(obj) {
    var loc = get(this, 'length') || 0;
    while(--loc >= 0) {
      var curObject = this.objectAt(loc) ;
      if (curObject === obj) this.removeAt(loc) ;
    }
    return this ;
  },

  addObject: function(obj) {
    if (!this.contains(obj)) this.pushObject(obj);
    return this ;
  }

});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set, defineProperty = Ember.defineProperty;

/**
  ## Overview

  This mixin provides properties and property observing functionality, core
  features of the Ember object model.

  Properties and observers allow one object to observe changes to a
  property on another object. This is one of the fundamental ways that
  models, controllers and views communicate with each other in an Ember
  application.

  Any object that has this mixin applied can be used in observer
  operations. That includes Ember.Object and most objects you will
  interact with as you write your Ember application.

  Note that you will not generally apply this mixin to classes yourself,
  but you will use the features provided by this module frequently, so it
  is important to understand how to use it.

  ## Using get() and set()

  Because of Ember's support for bindings and observers, you will always
  access properties using the get method, and set properties using the
  set method. This allows the observing objects to be notified and
  computed properties to be handled properly.

  More documentation about `get` and `set` are below.

  ## Observing Property Changes

  You typically observe property changes simply by adding the `observes`
  call to the end of your method declarations in classes that you write.
  For example:

      Ember.Object.create({
        valueObserver: function() {
          // Executes whenever the "value" property changes
        }.observes('value')
      });

  Although this is the most common way to add an observer, this capability
  is actually built into the Ember.Object class on top of two methods
  defined in this mixin: `addObserver` and `removeObserver`. You can use
  these two methods to add and remove observers yourself if you need to
  do so at runtime.

  To add an observer for a property, call:

      object.addObserver('propertyKey', targetObject, targetAction)

  This will call the `targetAction` method on the `targetObject` to be called
  whenever the value of the `propertyKey` changes.

  Note that if `propertyKey` is a computed property, the observer will be
  called when any of the property dependencies are changed, even if the
  resulting value of the computed property is unchanged. This is necessary
  because computed properties are not computed until `get` is called.

  @class Observable
  @namespace Ember
  @extends Ember.Mixin
*/
Ember.Observable = Ember.Mixin.create(/** @scope Ember.Observable.prototype */ {

  // compatibility
  isObserverable: true,

  /**
    Retrieves the value of a property from the object.

    This method is usually similar to using object[keyName] or object.keyName,
    however it supports both computed properties and the unknownProperty
    handler.

    Because `get` unifies the syntax for accessing all these kinds
    of properties, it can make many refactorings easier, such as replacing a
    simple property with a computed property, or vice versa.

    ### Computed Properties

    Computed properties are methods defined with the `property` modifier
    declared at the end, such as:

          fullName: function() {
            return this.getEach('firstName', 'lastName').compact().join(' ');
          }.property('firstName', 'lastName')

    When you call `get` on a computed property, the function will be
    called and the return value will be returned instead of the function
    itself.

    ### Unknown Properties

    Likewise, if you try to call `get` on a property whose value is
    undefined, the unknownProperty() method will be called on the object.
    If this method returns any value other than undefined, it will be returned
    instead. This allows you to implement "virtual" properties that are
    not defined upfront.

    @method get
    @param {String} key The property to retrieve
    @return {Object} The property value or undefined.
  */
  get: function(keyName) {
    return get(this, keyName);
  },

  /**
    To get multiple properties at once, call getProperties
    with a list of strings or an array:

          record.getProperties('firstName', 'lastName', 'zipCode'); // => { firstName: 'John', lastName: 'Doe', zipCode: '10011' }

   is equivalent to:

          record.getProperties(['firstName', 'lastName', 'zipCode']); // => { firstName: 'John', lastName: 'Doe', zipCode: '10011' }

    @method getProperties
    @param {String...|Array} list of keys to get
    @return {Hash}
  */
  getProperties: function() {
    var ret = {};
    var propertyNames = arguments;
    if (arguments.length === 1 && Ember.typeOf(arguments[0]) === 'array') {
      propertyNames = arguments[0];
    }
    for(var i = 0; i < propertyNames.length; i++) {
      ret[propertyNames[i]] = get(this, propertyNames[i]);
    }
    return ret;
  },

  /**
    Sets the provided key or path to the value.

    This method is generally very similar to calling object[key] = value or
    object.key = value, except that it provides support for computed
    properties, the unknownProperty() method and property observers.

    ### Computed Properties

    If you try to set a value on a key that has a computed property handler
    defined (see the get() method for an example), then set() will call
    that method, passing both the value and key instead of simply changing
    the value itself. This is useful for those times when you need to
    implement a property that is composed of one or more member
    properties.

    ### Unknown Properties

    If you try to set a value on a key that is undefined in the target
    object, then the unknownProperty() handler will be called instead. This
    gives you an opportunity to implement complex "virtual" properties that
    are not predefined on the object. If unknownProperty() returns
    undefined, then set() will simply set the value on the object.

    ### Property Observers

    In addition to changing the property, set() will also register a
    property change with the object. Unless you have placed this call
    inside of a beginPropertyChanges() and endPropertyChanges(), any "local"
    observers (i.e. observer methods declared on the same object), will be
    called immediately. Any "remote" observers (i.e. observer methods
    declared on another object) will be placed in a queue and called at a
    later time in a coalesced manner.

    ### Chaining

    In addition to property changes, set() returns the value of the object
    itself so you can do chaining like this:

          record.set('firstName', 'Charles').set('lastName', 'Jolley');

    @method set
    @param {String} key The property to set
    @param {Object} value The value to set or null.
    @return {Ember.Observable}
  */
  set: function(keyName, value) {
    set(this, keyName, value);
    return this;
  },

  /**
    To set multiple properties at once, call setProperties
    with a Hash:

          record.setProperties({ firstName: 'Charles', lastName: 'Jolley' });

    @method setProperties
    @param {Hash} hash the hash of keys and values to set
    @return {Ember.Observable}
  */
  setProperties: function(hash) {
    return Ember.setProperties(this, hash);
  },

  /**
    Begins a grouping of property changes.

    You can use this method to group property changes so that notifications
    will not be sent until the changes are finished. If you plan to make a
    large number of changes to an object at one time, you should call this
    method at the beginning of the changes to begin deferring change
    notifications. When you are done making changes, call endPropertyChanges()
    to deliver the deferred change notifications and end deferring.

    @method beginPropertyChanges
    @return {Ember.Observable}
  */
  beginPropertyChanges: function() {
    Ember.beginPropertyChanges();
    return this;
  },

  /**
    Ends a grouping of property changes.

    You can use this method to group property changes so that notifications
    will not be sent until the changes are finished. If you plan to make a
    large number of changes to an object at one time, you should call
    beginPropertyChanges() at the beginning of the changes to defer change
    notifications. When you are done making changes, call this method to
    deliver the deferred change notifications and end deferring.

    @method endPropertyChanges
    @return {Ember.Observable}
  */
  endPropertyChanges: function() {
    Ember.endPropertyChanges();
    return this;
  },

  /**
    Notify the observer system that a property is about to change.

    Sometimes you need to change a value directly or indirectly without
    actually calling get() or set() on it. In this case, you can use this
    method and propertyDidChange() instead. Calling these two methods
    together will notify all observers that the property has potentially
    changed value.

    Note that you must always call propertyWillChange and propertyDidChange as
    a pair. If you do not, it may get the property change groups out of order
    and cause notifications to be delivered more often than you would like.

    @method propertyWillChange
    @param {String} key The property key that is about to change.
    @return {Ember.Observable}
  */
  propertyWillChange: function(keyName){
    Ember.propertyWillChange(this, keyName);
    return this;
  },

  /**
    Notify the observer system that a property has just changed.

    Sometimes you need to change a value directly or indirectly without
    actually calling get() or set() on it. In this case, you can use this
    method and propertyWillChange() instead. Calling these two methods
    together will notify all observers that the property has potentially
    changed value.

    Note that you must always call propertyWillChange and propertyDidChange as
    a pair. If you do not, it may get the property change groups out of order
    and cause notifications to be delivered more often than you would like.

    @method propertyDidChange
    @param {String} keyName The property key that has just changed.
    @return {Ember.Observable}
  */
  propertyDidChange: function(keyName) {
    Ember.propertyDidChange(this, keyName);
    return this;
  },

  /**
    Convenience method to call `propertyWillChange` and `propertyDidChange` in
    succession.

    @method notifyPropertyChange
    @param {String} keyName The property key to be notified about.
    @return {Ember.Observable}
  */
  notifyPropertyChange: function(keyName) {
    this.propertyWillChange(keyName);
    this.propertyDidChange(keyName);
    return this;
  },

  addBeforeObserver: function(key, target, method) {
    Ember.addBeforeObserver(this, key, target, method);
  },

  /**
    Adds an observer on a property.

    This is the core method used to register an observer for a property.

    Once you call this method, anytime the key's value is set, your observer
    will be notified. Note that the observers are triggered anytime the
    value is set, regardless of whether it has actually changed. Your
    observer should be prepared to handle that.

    You can also pass an optional context parameter to this method. The
    context will be passed to your observer method whenever it is triggered.
    Note that if you add the same target/method pair on a key multiple times
    with different context parameters, your observer will only be called once
    with the last context you passed.

    ### Observer Methods

    Observer methods you pass should generally have the following signature if
    you do not pass a "context" parameter:

          fooDidChange: function(sender, key, value, rev);

    The sender is the object that changed. The key is the property that
    changes. The value property is currently reserved and unused. The rev
    is the last property revision of the object when it changed, which you can
    use to detect if the key value has really changed or not.

    If you pass a "context" parameter, the context will be passed before the
    revision like so:

          fooDidChange: function(sender, key, value, context, rev);

    Usually you will not need the value, context or revision parameters at
    the end. In this case, it is common to write observer methods that take
    only a sender and key value as parameters or, if you aren't interested in
    any of these values, to write an observer that has no parameters at all.

    @method addObserver
    @param {String} key The key to observer
    @param {Object} target The target object to invoke
    @param {String|Function} method The method to invoke.
    @return {Ember.Object} self
  */
  addObserver: function(key, target, method) {
    Ember.addObserver(this, key, target, method);
  },

  /**
    Remove an observer you have previously registered on this object. Pass
    the same key, target, and method you passed to addObserver() and your
    target will no longer receive notifications.

    @method removeObserver
    @param {String} key The key to observer
    @param {Object} target The target object to invoke
    @param {String|Function} method The method to invoke.
    @return {Ember.Observable} receiver
  */
  removeObserver: function(key, target, method) {
    Ember.removeObserver(this, key, target, method);
  },

  /**
    Returns true if the object currently has observers registered for a
    particular key. You can use this method to potentially defer performing
    an expensive action until someone begins observing a particular property
    on the object.

    @method hasObserverFor
    @param {String} key Key to check
    @return {Boolean}
  */
  hasObserverFor: function(key) {
    return Ember.hasListeners(this, key+':change');
  },

  /**
    This method will be called when a client attempts to get the value of a
    property that has not been defined in one of the typical ways. Override
    this method to create "virtual" properties.

    @method unknownProperty
    @param {String} key The name of the unknown property that was requested.
    @return {Object} The property value or undefined. Default is undefined.
  */
  unknownProperty: function(key) {
    return undefined;
  },

  /**
    This method will be called when a client attempts to set the value of a
    property that has not been defined in one of the typical ways. Override
    this method to create "virtual" properties.

    @method setUnknownProperty
    @param {String} key The name of the unknown property to be set.
    @param {Object} value The value the unknown property is to be set to.
  */
  setUnknownProperty: function(key, value) {
    defineProperty(this, key);
    set(this, key, value);
  },

  /**
    @deprecated
    @method getPath
    @param {String} path The property path to retrieve
    @return {Object} The property value or undefined.
  */
  getPath: function(path) {
    Ember.deprecate("getPath is deprecated since get now supports paths");
    return this.get(path);
  },

  /**
    @deprecated
    @method setPath
    @param {String} path The path to the property that will be set
    @param {Object} value The value to set or null.
    @return {Ember.Observable}
  */
  setPath: function(path, value) {
    Ember.deprecate("setPath is deprecated since set now supports paths");
    return this.set(path, value);
  },

  /**
    Retrieves the value of a property, or a default value in the case that the property
    returns undefined.

        person.getWithDefault('lastName', 'Doe');

    @method getWithDefault
    @param {String} keyName The name of the property to retrieve
    @param {Object} defaultValue The value to return if the property value is undefined
    @return {Object} The property value or the defaultValue.
  */
  getWithDefault: function(keyName, defaultValue) {
    return Ember.getWithDefault(this, keyName, defaultValue);
  },

  /**
    Set the value of a property to the current value plus some amount.

        person.incrementProperty('age');
        team.incrementProperty('score', 2);

    @method incrementProperty
    @param {String} keyName The name of the property to increment
    @param {Object} increment The amount to increment by. Defaults to 1
    @return {Object} The new property value
  */
  incrementProperty: function(keyName, increment) {
    if (!increment) { increment = 1; }
    set(this, keyName, (get(this, keyName) || 0)+increment);
    return get(this, keyName);
  },

  /**
    Set the value of a property to the current value minus some amount.

        player.decrementProperty('lives');
        orc.decrementProperty('health', 5);

    @method decrementProperty
    @param {String} keyName The name of the property to decrement
    @param {Object} increment The amount to decrement by. Defaults to 1
    @return {Object} The new property value
  */
  decrementProperty: function(keyName, increment) {
    if (!increment) { increment = 1; }
    set(this, keyName, (get(this, keyName) || 0)-increment);
    return get(this, keyName);
  },

  /**
    Set the value of a boolean property to the opposite of it's
    current value.

        starship.toggleProperty('warpDriveEnaged');

    @method toggleProperty
    @param {String} keyName The name of the property to toggle
    @return {Object} The new property value
  */
  toggleProperty: function(keyName) {
    set(this, keyName, !get(this, keyName));
    return get(this, keyName);
  },

  /**
    Returns the cached value of a computed property, if it exists.
    This allows you to inspect the value of a computed property
    without accidentally invoking it if it is intended to be
    generated lazily.

    @method cacheFor
    @param {String} keyName
    @return {Object} The cached value of the computed property, if any
  */
  cacheFor: function(keyName) {
    return Ember.cacheFor(this, keyName);
  },

  // intended for debugging purposes
  observersForKey: function(keyName) {
    return Ember.observersFor(this, keyName);
  }
});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set;

/**
@class TargetActionSupport
@namespace Ember
@extends Ember.Mixin
*/
Ember.TargetActionSupport = Ember.Mixin.create({
  target: null,
  action: null,

  targetObject: Ember.computed(function() {
    var target = get(this, 'target');

    if (Ember.typeOf(target) === "string") {
      var value = get(this, target);
      if (value === undefined) { value = get(Ember.lookup, target); }
      return value;
    } else {
      return target;
    }
  }).property('target').cacheable(),

  triggerAction: function() {
    var action = get(this, 'action'),
        target = get(this, 'targetObject');

    if (target && action) {
      var ret;

      if (typeof target.send === 'function') {
        ret = target.send(action, this);
      } else {
        if (typeof action === 'string') {
          action = target[action];
        }
        ret = action.call(target, this);
      }
      if (ret !== false) ret = true;

      return ret;
    } else {
      return false;
    }
  }
});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

/**
  @class Evented
  @namespace Ember
  @extends Ember.Mixin
 */
Ember.Evented = Ember.Mixin.create({
  on: function(name, target, method) {
    Ember.addListener(this, name, target, method);
  },

  one: function(name, target, method) {
    if (!method) {
      method = target;
      target = null;
    }

    var self = this;
    var wrapped = function() {
      Ember.removeListener(self, name, target, method);

      if ('string' === typeof method) { method = this[method]; }

      // Internally, a `null` target means that the target is
      // the first parameter to addListener. That means that
      // the `this` passed into this function is the target
      // determined by the event system.
      method.apply(this, arguments);
    };

    Ember.addListener(this, name, target, wrapped, Ember.guidFor(method));
  },

  trigger: function(name) {
    var args = [], i, l;
    for (i = 1, l = arguments.length; i < l; i++) {
      args.push(arguments[i]);
    }
    Ember.sendEvent(this, name, args);
  },

  fire: function(name) {
    Ember.deprecate("Ember.Evented#fire() has been deprecated in favor of trigger() for compatibility with jQuery. It will be removed in 1.0. Please update your code to call trigger() instead.");
    this.trigger.apply(this, arguments);
  },

  off: function(name, target, method) {
    Ember.removeListener(this, name, target, method);
  },

  has: function(name) {
    return Ember.hasListeners(this, name);
  }
});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set,
    slice = Array.prototype.slice,
    forEach = Ember.ArrayPolyfills.forEach;

var Callbacks = function(target, once) {
  this.target = target;
  this.once = once || false;
  this.list = [];
  this.fired = false;
  this.off = false;
};

Callbacks.prototype = {
  add: function(callback) {
    if (this.off) { return; }

    this.list.push(callback);

    if (this.fired) { this.flush(); }
  },

  fire: function() {
    if (this.off || this.once && this.fired) { return; }
    if (!this.fired) { this.fired = true; }

    this.args = slice.call(arguments);

    if (this.list.length > 0) { this.flush(); }
  },

  flush: function() {
    Ember.run.once(this, 'flushCallbacks');
  },

  flushCallbacks: function() {
    forEach.call(this.list, function(callback) {
      callback.apply(this.target, this.args);
    }, this);
    if (this.once) { this.list = []; }
  }
};

/**
  @class Deferred
  @namespace Ember
  @extends Ember.Mixin
 */
Ember.Deferred = Ember.Mixin.create({

  /**
    Add handlers to be called when the Deferred object is resolved or rejected.

    @method then
    @param {Function} doneCallback a callback function to be called when done
    @param {Function} failCallback a callback function to be called when failed
    @param {Function} progressCallback a callback function to be called when progressed
  */
  then: function(doneCallback, failCallback, progressCallback) {
    if (doneCallback) {
      get(this, 'deferredDone').add(doneCallback);
    }
    if (failCallback) {
      get(this, 'deferredFail').add(failCallback);
    }
    if (progressCallback) {
      get(this, 'deferredProgress').add(progressCallback);
    }

    return this;
  },

  /**
    Call the progressCallbacks on a Deferred object with the given args.

    @method notify
  */
  notify: function() {
    var callbacks = get(this, 'deferredProgress');
    callbacks.fire.apply(callbacks, slice.call(arguments));

    return this;
  },

  /**
    Resolve a Deferred object and call any doneCallbacks with the given args.

    @method resolve
  */
  resolve: function() {
    var callbacks = get(this, 'deferredDone');
    callbacks.fire.apply(callbacks, slice.call(arguments));
    set(this, 'deferredProgress.off', true);
    set(this, 'deferredFail.off', true);

    return this;
  },

  /**
    Reject a Deferred object and call any failCallbacks with the given args.

    @method reject
  */
  reject: function() {
    var callbacks = get(this, 'deferredFail');
    callbacks.fire.apply(callbacks, slice.call(arguments));
    set(this, 'deferredProgress.off', true);
    set(this, 'deferredDone.off', true);

    return this;
  },

  deferredDone: Ember.computed(function() {
    return new Callbacks(this, true);
  }).cacheable(),

  deferredFail: Ember.computed(function() {
    return new Callbacks(this, true);
  }).cacheable(),

  deferredProgress: Ember.computed(function() {
    return new Callbacks(this);
  }).cacheable()
});

})();

(function() {

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

// NOTE: this object should never be included directly.  Instead use Ember.
// Ember.Object.  We only define this separately so that Ember.Set can depend on it

var set = Ember.set, get = Ember.get,
    o_create = Ember.create,
    o_defineProperty = Ember.platform.defineProperty,
    a_slice = Array.prototype.slice,
    GUID_KEY = Ember.GUID_KEY,
    guidFor = Ember.guidFor,
    generateGuid = Ember.generateGuid,
    meta = Ember.meta,
    rewatch = Ember.rewatch,
    finishChains = Ember.finishChains,
    destroy = Ember.destroy,
    schedule = Ember.run.schedule,
    Mixin = Ember.Mixin,
    applyMixin = Mixin._apply,
    finishPartial = Mixin.finishPartial,
    reopen = Mixin.prototype.reopen,
    classToString = Mixin.prototype.toString;

var undefinedDescriptor = {
  configurable: true,
  writable: true,
  enumerable: false,
  value: undefined
};

function makeCtor() {

  // Note: avoid accessing any properties on the object since it makes the
  // method a lot faster.  This is glue code so we want it to be as fast as
  // possible.

  var wasApplied = false, initMixins;

  var Class = function() {
    if (!wasApplied) {
      Class.proto(); // prepare prototype...
    }
    o_defineProperty(this, GUID_KEY, undefinedDescriptor);
    o_defineProperty(this, '_super', undefinedDescriptor);
    var m = meta(this);
    m.proto = this;
    if (initMixins) {
      this.reopen.apply(this, initMixins);
      initMixins = null;
    }
    finishPartial(this, m);
    delete m.proto;
    finishChains(this);
    this.init.apply(this, arguments);
  };

  Class.toString = classToString;
  Class.willReopen = function() {
    if (wasApplied) {
      Class.PrototypeMixin = Mixin.create(Class.PrototypeMixin);
    }

    wasApplied = false;
  };
  Class._initMixins = function(args) { initMixins = args; };

  Class.proto = function() {
    var superclass = Class.superclass;
    if (superclass) { superclass.proto(); }

    if (!wasApplied) {
      wasApplied = true;
      Class.PrototypeMixin.applyPartial(Class.prototype);
      rewatch(Class.prototype);
    }

    return this.prototype;
  };

  return Class;

}

var CoreObject = makeCtor();

CoreObject.PrototypeMixin = Mixin.create({

  reopen: function() {
    applyMixin(this, arguments, true);
    return this;
  },

  isInstance: true,

  init: function() {},

  /**
    @property isDestroyed
    @default false
  */
  isDestroyed: false,

  /**
    @property isDestroying
    @default false
  */
  isDestroying: false,

  /**
    Destroys an object by setting the isDestroyed flag and removing its
    metadata, which effectively destroys observers and bindings.

    If you try to set a property on a destroyed object, an exception will be
    raised.

    Note that destruction is scheduled for the end of the run loop and does not
    happen immediately.

    @method destroy
    @return {Ember.Object} receiver
  */
  destroy: function() {
    if (this.isDestroying) { return; }

    this.isDestroying = true;

    if (this.willDestroy) { this.willDestroy(); }

    set(this, 'isDestroyed', true);
    schedule('destroy', this, this._scheduledDestroy);
    return this;
  },

  /**
    @private

    Invoked by the run loop to actually destroy the object. This is
    scheduled for execution by the `destroy` method.

    @method _scheduledDestroy
  */
  _scheduledDestroy: function() {
    destroy(this);
    if (this.didDestroy) { this.didDestroy(); }
  },

  bind: function(to, from) {
    if (!(from instanceof Ember.Binding)) { from = Ember.Binding.from(from); }
    from.to(to).connect(this);
    return from;
  },

  toString: function() {
    return '<'+this.constructor.toString()+':'+guidFor(this)+'>';
  }
});

if (Ember.config.overridePrototypeMixin) {
  Ember.config.overridePrototypeMixin(CoreObject.PrototypeMixin);
}

CoreObject.__super__ = null;

var ClassMixin = Mixin.create({

  ClassMixin: Ember.required(),

  PrototypeMixin: Ember.required(),

  isClass: true,

  isMethod: false,

  extend: function() {
    var Class = makeCtor(), proto;
    Class.ClassMixin = Mixin.create(this.ClassMixin);
    Class.PrototypeMixin = Mixin.create(this.PrototypeMixin);

    Class.ClassMixin.ownerConstructor = Class;
    Class.PrototypeMixin.ownerConstructor = Class;

    reopen.apply(Class.PrototypeMixin, arguments);

    Class.superclass = this;
    Class.__super__  = this.prototype;

    proto = Class.prototype = o_create(this.prototype);
    proto.constructor = Class;
    generateGuid(proto, 'ember');
    meta(proto).proto = proto; // this will disable observers on prototype

    Class.ClassMixin.apply(Class);
    return Class;
  },

  create: function() {
    var C = this;
    if (arguments.length>0) { this._initMixins(arguments); }
    return new C();
  },

  reopen: function() {
    this.willReopen();
    reopen.apply(this.PrototypeMixin, arguments);
    return this;
  },

  reopenClass: function() {
    reopen.apply(this.ClassMixin, arguments);
    applyMixin(this, arguments, false);
    return this;
  },

  detect: function(obj) {
    if ('function' !== typeof obj) { return false; }
    while(obj) {
      if (obj===this) { return true; }
      obj = obj.superclass;
    }
    return false;
  },

  detectInstance: function(obj) {
    return obj instanceof this;
  },

  /**
    In some cases, you may want to annotate computed properties with additional
    metadata about how they function or what values they operate on. For example,
    computed property functions may close over variables that are then no longer
    available for introspection.

    You can pass a hash of these values to a computed property like this:

        person: function() {
          var personId = this.get('personId');
          return App.Person.create({ id: personId });
        }.property().meta({ type: App.Person })

    Once you've done this, you can retrieve the values saved to the computed
    property from your class like this:

        MyClass.metaForProperty('person');

    This will return the original hash that was passed to `meta()`.

    @method metaForProperty
    @param key {String} property name
  */
  metaForProperty: function(key) {
    var desc = meta(this.proto(), false).descs[key];

    Ember.assert("metaForProperty() could not find a computed property with key '"+key+"'.", !!desc && desc instanceof Ember.ComputedProperty);
    return desc._meta || {};
  },

  /**
    Iterate over each computed property for the class, passing its name
    and any associated metadata (see `metaForProperty`) to the callback.

    @method eachComputedProperty
    @param {Function} callback
    @param {Object} binding
  */
  eachComputedProperty: function(callback, binding) {
    var proto = this.proto(),
        descs = meta(proto).descs,
        empty = {},
        property;

    for (var name in descs) {
      property = descs[name];

      if (property instanceof Ember.ComputedProperty) {
        callback.call(binding || this, name, property._meta || empty);
      }
    }
  }

});

if (Ember.config.overrideClassMixin) {
  Ember.config.overrideClassMixin(ClassMixin);
}

CoreObject.ClassMixin = ClassMixin;
ClassMixin.apply(CoreObject);

/**
  @class CoreObject
  @namespace Ember
*/
Ember.CoreObject = CoreObject;

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set, guidFor = Ember.guidFor, none = Ember.none;

/**
  An unordered collection of objects.

  A Set works a bit like an array except that its items are not ordered.
  You can create a set to efficiently test for membership for an object. You
  can also iterate through a set just like an array, even accessing objects
  by index, however there is no guarantee as to their order.

  All Sets are observable via the Enumerable Observer API - which works
  on any enumerable object including both Sets and Arrays.

  ## Creating a Set

  You can create a set like you would most objects using
  `new Ember.Set()`.  Most new sets you create will be empty, but you can
  also initialize the set with some content by passing an array or other
  enumerable of objects to the constructor.

  Finally, you can pass in an existing set and the set will be copied. You
  can also create a copy of a set by calling `Ember.Set#copy()`.

      #js
      // creates a new empty set
      var foundNames = new Ember.Set();

      // creates a set with four names in it.
      var names = new Ember.Set(["Charles", "Tom", "Juan", "Alex"]); // :P

      // creates a copy of the names set.
      var namesCopy = new Ember.Set(names);

      // same as above.
      var anotherNamesCopy = names.copy();

  ## Adding/Removing Objects

  You generally add or remove objects from a set using `add()` or
  `remove()`. You can add any type of object including primitives such as
  numbers, strings, and booleans.

  Unlike arrays, objects can only exist one time in a set. If you call `add()`
  on a set with the same object multiple times, the object will only be added
  once. Likewise, calling `remove()` with the same object multiple times will
  remove the object the first time and have no effect on future calls until
  you add the object to the set again.

  NOTE: You cannot add/remove null or undefined to a set. Any attempt to do so
  will be ignored.

  In addition to add/remove you can also call `push()`/`pop()`. Push behaves
  just like `add()` but `pop()`, unlike `remove()` will pick an arbitrary
  object, remove it and return it. This is a good way to use a set as a job
  queue when you don't care which order the jobs are executed in.

  ## Testing for an Object

  To test for an object's presence in a set you simply call
  `Ember.Set#contains()`.

  ## Observing changes

  When using `Ember.Set`, you can observe the `"[]"` property to be
  alerted whenever the content changes.  You can also add an enumerable
  observer to the set to be notified of specific objects that are added and
  removed from the set.  See `Ember.Enumerable` for more information on
  enumerables.

  This is often unhelpful. If you are filtering sets of objects, for instance,
  it is very inefficient to re-filter all of the items each time the set
  changes. It would be better if you could just adjust the filtered set based
  on what was changed on the original set. The same issue applies to merging
  sets, as well.

  ## Other Methods

  `Ember.Set` primary implements other mixin APIs.  For a complete reference
  on the methods you will use with `Ember.Set`, please consult these mixins.
  The most useful ones will be `Ember.Enumerable` and
  `Ember.MutableEnumerable` which implement most of the common iterator
  methods you are used to on Array.

  Note that you can also use the `Ember.Copyable` and `Ember.Freezable`
  APIs on `Ember.Set` as well.  Once a set is frozen it can no longer be
  modified.  The benefit of this is that when you call frozenCopy() on it,
  Ember will avoid making copies of the set.  This allows you to write
  code that can know with certainty when the underlying set data will or
  will not be modified.

  @class Set
  @namespace Ember
  @extends Ember.CoreObject
  @uses Ember.MutableEnumerable
  @uses Ember.Copyable
  @uses Ember.Freezable
  @since Ember 0.9
*/
Ember.Set = Ember.CoreObject.extend(Ember.MutableEnumerable, Ember.Copyable, Ember.Freezable,
  /** @scope Ember.Set.prototype */ {

  // ..........................................................
  // IMPLEMENT ENUMERABLE APIS
  //

  /**
    This property will change as the number of objects in the set changes.

    @property length
    @type number
    @default 0
  */
  length: 0,

  /**
    Clears the set. This is useful if you want to reuse an existing set
    without having to recreate it.

        var colors = new Ember.Set(["red", "green", "blue"]);
        colors.length;  => 3
        colors.clear();
        colors.length;  => 0

    @method clear
    @return {Ember.Set} An empty Set
  */
  clear: function() {
    if (this.isFrozen) { throw new Error(Ember.FROZEN_ERROR); }

    var len = get(this, 'length');
    if (len === 0) { return this; }

    var guid;

    this.enumerableContentWillChange(len, 0);
    Ember.propertyWillChange(this, 'firstObject');
    Ember.propertyWillChange(this, 'lastObject');

    for (var i=0; i < len; i++){
      guid = guidFor(this[i]);
      delete this[guid];
      delete this[i];
    }

    set(this, 'length', 0);

    Ember.propertyDidChange(this, 'firstObject');
    Ember.propertyDidChange(this, 'lastObject');
    this.enumerableContentDidChange(len, 0);

    return this;
  },

  /**
    Returns true if the passed object is also an enumerable that contains the
    same objects as the receiver.

        var colors = ["red", "green", "blue"],
            same_colors = new Ember.Set(colors);
        same_colors.isEqual(colors); => true
        same_colors.isEqual(["purple", "brown"]); => false

    @method isEqual
    @param {Ember.Set} obj the other object.
    @return {Boolean}
  */
  isEqual: function(obj) {
    // fail fast
    if (!Ember.Enumerable.detect(obj)) return false;

    var loc = get(this, 'length');
    if (get(obj, 'length') !== loc) return false;

    while(--loc >= 0) {
      if (!obj.contains(this[loc])) return false;
    }

    return true;
  },

  /**
    Adds an object to the set. Only non-null objects can be added to a set
    and those can only be added once. If the object is already in the set or
    the passed value is null this method will have no effect.

    This is an alias for `Ember.MutableEnumerable.addObject()`.

        var colors = new Ember.Set();
        colors.add("blue");    => ["blue"]
        colors.add("blue");    => ["blue"]
        colors.add("red");     => ["blue", "red"]
        colors.add(null);      => ["blue", "red"]
        colors.add(undefined); => ["blue", "red"]

    @method add
    @param {Object} obj The object to add.
    @return {Ember.Set} The set itself.
  */
  add: Ember.alias('addObject'),

  /**
    Removes the object from the set if it is found.  If you pass a null value
    or an object that is already not in the set, this method will have no
    effect. This is an alias for `Ember.MutableEnumerable.removeObject()`.

        var colors = new Ember.Set(["red", "green", "blue"]);
        colors.remove("red");    => ["blue", "green"]
        colors.remove("purple"); => ["blue", "green"]
        colors.remove(null);     => ["blue", "green"]

    @method remove
    @param {Object} obj The object to remove
    @return {Ember.Set} The set itself.
  */
  remove: Ember.alias('removeObject'),

  /**
    Removes the last element from the set and returns it, or null if it's empty.

        var colors = new Ember.Set(["green", "blue"]);
        colors.pop(); => "blue"
        colors.pop(); => "green"
        colors.pop(); => null

    @method pop
    @return {Object} The removed object from the set or null.
  */
  pop: function() {
    if (get(this, 'isFrozen')) throw new Error(Ember.FROZEN_ERROR);
    var obj = this.length > 0 ? this[this.length-1] : null;
    this.remove(obj);
    return obj;
  },

  /**
    Inserts the given object on to the end of the set. It returns
    the set itself.

    This is an alias for `Ember.MutableEnumerable.addObject()`.

        var colors = new Ember.Set();
        colors.push("red");   => ["red"]
        colors.push("green"); => ["red", "green"]
        colors.push("blue");  => ["red", "green", "blue"]

    @method push
    @return {Ember.Set} The set itself.
  */
  push: Ember.alias('addObject'),

  /**
    Removes the last element from the set and returns it, or null if it's empty.

    This is an alias for `Ember.Set.pop()`.

        var colors = new Ember.Set(["green", "blue"]);
        colors.shift(); => "blue"
        colors.shift(); => "green"
        colors.shift(); => null

    @method shift
    @return {Object} The removed object from the set or null.
  */
  shift: Ember.alias('pop'),

  /**
    Inserts the given object on to the end of the set. It returns
    the set itself.

    This is an alias of `Ember.Set.push()`

        var colors = new Ember.Set();
        colors.unshift("red");   => ["red"]
        colors.unshift("green"); => ["red", "green"]
        colors.unshift("blue");  => ["red", "green", "blue"]

    @method unshift
    @return {Ember.Set} The set itself.
  */
  unshift: Ember.alias('push'),

  /**
    Adds each object in the passed enumerable to the set.

    This is an alias of `Ember.MutableEnumerable.addObjects()`

        var colors = new Ember.Set();
        colors.addEach(["red", "green", "blue"]); => ["red", "green", "blue"]

    @method addEach
    @param {Ember.Enumerable} objects the objects to add.
    @return {Ember.Set} The set itself.
  */
  addEach: Ember.alias('addObjects'),

  /**
    Removes each object in the passed enumerable to the set.

    This is an alias of `Ember.MutableEnumerable.removeObjects()`

        var colors = new Ember.Set(["red", "green", "blue"]);
        colors.removeEach(["red", "blue"]); => ["green"]

    @method removeEach
    @param {Ember.Enumerable} objects the objects to remove.
    @return {Ember.Set} The set itself.
  */
  removeEach: Ember.alias('removeObjects'),

  // ..........................................................
  // PRIVATE ENUMERABLE SUPPORT
  //

  init: function(items) {
    this._super();
    if (items) this.addObjects(items);
  },

  // implement Ember.Enumerable
  nextObject: function(idx) {
    return this[idx];
  },

  // more optimized version
  firstObject: Ember.computed(function() {
    return this.length > 0 ? this[0] : undefined;
  }).property().cacheable(),

  // more optimized version
  lastObject: Ember.computed(function() {
    return this.length > 0 ? this[this.length-1] : undefined;
  }).property().cacheable(),

  // implements Ember.MutableEnumerable
  addObject: function(obj) {
    if (get(this, 'isFrozen')) throw new Error(Ember.FROZEN_ERROR);
    if (none(obj)) return this; // nothing to do

    var guid = guidFor(obj),
        idx  = this[guid],
        len  = get(this, 'length'),
        added ;

    if (idx>=0 && idx<len && (this[idx] === obj)) return this; // added

    added = [obj];

    this.enumerableContentWillChange(null, added);
    Ember.propertyWillChange(this, 'lastObject');

    len = get(this, 'length');
    this[guid] = len;
    this[len] = obj;
    set(this, 'length', len+1);

    Ember.propertyDidChange(this, 'lastObject');
    this.enumerableContentDidChange(null, added);

    return this;
  },

  // implements Ember.MutableEnumerable
  removeObject: function(obj) {
    if (get(this, 'isFrozen')) throw new Error(Ember.FROZEN_ERROR);
    if (none(obj)) return this; // nothing to do

    var guid = guidFor(obj),
        idx  = this[guid],
        len = get(this, 'length'),
        isFirst = idx === 0,
        isLast = idx === len-1,
        last, removed;

    if (idx>=0 && idx<len && (this[idx] === obj)) {
      removed = [obj];

      this.enumerableContentWillChange(removed, null);
      if (isFirst) { Ember.propertyWillChange(this, 'firstObject'); }
      if (isLast)  { Ember.propertyWillChange(this, 'lastObject'); }

      // swap items - basically move the item to the end so it can be removed
      if (idx < len-1) {
        last = this[len-1];
        this[idx] = last;
        this[guidFor(last)] = idx;
      }

      delete this[guid];
      delete this[len-1];
      set(this, 'length', len-1);

      if (isFirst) { Ember.propertyDidChange(this, 'firstObject'); }
      if (isLast)  { Ember.propertyDidChange(this, 'lastObject'); }
      this.enumerableContentDidChange(removed, null);
    }

    return this;
  },

  // optimized version
  contains: function(obj) {
    return this[guidFor(obj)]>=0;
  },

  copy: function() {
    var C = this.constructor, ret = new C(), loc = get(this, 'length');
    set(ret, 'length', loc);
    while(--loc>=0) {
      ret[loc] = this[loc];
      ret[guidFor(this[loc])] = loc;
    }
    return ret;
  },

  toString: function() {
    var len = this.length, idx, array = [];
    for(idx = 0; idx < len; idx++) {
      array[idx] = this[idx];
    }
    return "Ember.Set<%@>".fmt(array.join(','));
  }

});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

/**
  `Ember.Object` is the main base class for all Ember objects. It is a subclass
  of `Ember.CoreObject` with the `Ember.Observable` mixin applied. For details,
  see the documentation for each of these.

  @class Object
  @namespace Ember
  @extends Ember.CoreObject
  @uses Ember.Observable
*/
Ember.Object = Ember.CoreObject.extend(Ember.Observable);

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var indexOf = Ember.ArrayPolyfills.indexOf;

/**
  A Namespace is an object usually used to contain other objects or methods
  such as an application or framework.  Create a namespace anytime you want
  to define one of these new containers.

  # Example Usage

      MyFramework = Ember.Namespace.create({
        VERSION: '1.0.0'
      });

  @class Namespace
  @namespace Ember
  @extends Ember.Object
*/
Ember.Namespace = Ember.Object.extend({
  isNamespace: true,

  init: function() {
    Ember.Namespace.NAMESPACES.push(this);
    Ember.Namespace.PROCESSED = false;
  },

  toString: function() {
    Ember.identifyNamespaces();
    return this[Ember.GUID_KEY+'_name'];
  },

  destroy: function() {
    var namespaces = Ember.Namespace.NAMESPACES;
    Ember.lookup[this.toString()] = undefined;
    namespaces.splice(indexOf.call(namespaces, this), 1);
    this._super();
  }
});

Ember.Namespace.NAMESPACES = [Ember];
Ember.Namespace.PROCESSED = false;

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

/**
  Defines a namespace that will contain an executable application.  This is
  very similar to a normal namespace except that it is expected to include at
  least a 'ready' function which can be run to initialize the application.

  Currently Ember.Application is very similar to Ember.Namespace.  However, this
  class may be augmented by additional frameworks so it is important to use
  this instance when building new applications.

  # Example Usage

      MyApp = Ember.Application.create({
        VERSION: '1.0.0',
        store: Ember.Store.create().from(Ember.fixtures)
      });

      MyApp.ready = function() {
        //..init code goes here...
      }

  @class Application
  @namespace Ember
  @extends Ember.Namespace
*/
Ember.Application = Ember.Namespace.extend();

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set;

/**
  An ArrayProxy wraps any other object that implements Ember.Array and/or
  Ember.MutableArray, forwarding all requests. This makes it very useful for
  a number of binding use cases or other cases where being able to swap
  out the underlying array is useful.

  A simple example of usage:

      var pets = ['dog', 'cat', 'fish'];
      var ap = Ember.ArrayProxy.create({ content: Ember.A(pets) });
      ap.get('firstObject'); // => 'dog'
      ap.set('content', ['amoeba', 'paramecium']);
      ap.get('firstObject'); // => 'amoeba'

  This class can also be useful as a layer to transform the contents of
  an array, as they are accessed. This can be done by overriding
  `objectAtContent`:

      var pets = ['dog', 'cat', 'fish'];
      var ap = Ember.ArrayProxy.create({
          content: Ember.A(pets),
          objectAtContent: function(idx) {
              return this.get('content').objectAt(idx).toUpperCase();
          }
      });
      ap.get('firstObject'); // => 'DOG'

  @class ArrayProxy
  @namespace Ember
  @extends Ember.Object
  @uses Ember.MutableArray
*/
Ember.ArrayProxy = Ember.Object.extend(Ember.MutableArray,
/** @scope Ember.ArrayProxy.prototype */ {

  /**
    The content array.  Must be an object that implements Ember.Array and/or
    Ember.MutableArray.

    @property content
    @type Ember.Array
  */
  content: null,

  /**
   The array that the proxy pretends to be. In the default `ArrayProxy`
   implementation, this and `content` are the same. Subclasses of `ArrayProxy`
   can override this property to provide things like sorting and filtering.

   @property arrangedContent
  */
  arrangedContent: Ember.computed('content', function() {
    return get(this, 'content');
  }).cacheable(),

  /**
    Should actually retrieve the object at the specified index from the
    content. You can override this method in subclasses to transform the
    content item to something new.

    This method will only be called if content is non-null.

    @method objectAtContent
    @param {Number} idx The index to retrieve.
    @return {Object} the value or undefined if none found
  */
  objectAtContent: function(idx) {
    return get(this, 'arrangedContent').objectAt(idx);
  },

  /**
    Should actually replace the specified objects on the content array.
    You can override this method in subclasses to transform the content item
    into something new.

    This method will only be called if content is non-null.

    @method replaceContent
    @param {Number} idx The starting index
    @param {Number} amt The number of items to remove from the content.
    @param {Array} objects Optional array of objects to insert or null if no objects.
    @return {void}
  */
  replaceContent: function(idx, amt, objects) {
    get(this, 'arrangedContent').replace(idx, amt, objects);
  },

  /**
    @private

    Invoked when the content property is about to change. Notifies observers that the
    entire array content will change.

    @method _contentWillChange
  */
  _contentWillChange: Ember.beforeObserver(function() {
    this._teardownContent();
  }, 'content'),

  _teardownContent: function() {
    var content = get(this, 'content');

    if (content) {
      content.removeArrayObserver(this, {
        willChange: 'contentArrayWillChange',
        didChange: 'contentArrayDidChange'
      });
    }
  },

  contentArrayWillChange: Ember.K,
  contentArrayDidChange: Ember.K,

  /**
    @private

    Invoked when the content property changes.  Notifies observers that the
    entire array content has changed.

    @method _contentDidChange
  */
  _contentDidChange: Ember.observer(function() {
    var content = get(this, 'content');

    Ember.assert("Can't set ArrayProxy's content to itself", content !== this);

    this._setupContent();
  }, 'content'),

  _setupContent: function() {
    var content = get(this, 'content');

    if (content) {
      content.addArrayObserver(this, {
        willChange: 'contentArrayWillChange',
        didChange: 'contentArrayDidChange'
      });
    }
  },

  _arrangedContentWillChange: Ember.beforeObserver(function() {
    var arrangedContent = get(this, 'arrangedContent'),
        len = arrangedContent ? get(arrangedContent, 'length') : 0;

    this.arrangedContentArrayWillChange(this, 0, len, undefined);
    this.arrangedContentWillChange(this);

    this._teardownArrangedContent(arrangedContent);
  }, 'arrangedContent'),

  _arrangedContentDidChange: Ember.observer(function() {
    var arrangedContent = get(this, 'arrangedContent'),
        len = arrangedContent ? get(arrangedContent, 'length') : 0;

    Ember.assert("Can't set ArrayProxy's content to itself", arrangedContent !== this);

    this._setupArrangedContent();

    this.arrangedContentDidChange(this);
    this.arrangedContentArrayDidChange(this, 0, undefined, len);
  }, 'arrangedContent'),

  _setupArrangedContent: function() {
    var arrangedContent = get(this, 'arrangedContent');

    if (arrangedContent) {
      arrangedContent.addArrayObserver(this, {
        willChange: 'arrangedContentArrayWillChange',
        didChange: 'arrangedContentArrayDidChange'
      });
    }
  },

  _teardownArrangedContent: function() {
    var arrangedContent = get(this, 'arrangedContent');

    if (arrangedContent) {
      arrangedContent.removeArrayObserver(this, {
        willChange: 'arrangedContentArrayWillChange',
        didChange: 'arrangedContentArrayDidChange'
      });
    }
  },

  arrangedContentWillChange: Ember.K,
  arrangedContentDidChange: Ember.K,

  objectAt: function(idx) {
    return get(this, 'content') && this.objectAtContent(idx);
  },

  length: Ember.computed(function() {
    var arrangedContent = get(this, 'arrangedContent');
    return arrangedContent ? get(arrangedContent, 'length') : 0;
    // No dependencies since Enumerable notifies length of change
  }).property().cacheable(),

  replace: function(idx, amt, objects) {
    if (get(this, 'content')) this.replaceContent(idx, amt, objects);
    return this;
  },

  arrangedContentArrayWillChange: function(item, idx, removedCnt, addedCnt) {
    this.arrayContentWillChange(idx, removedCnt, addedCnt);
  },

  arrangedContentArrayDidChange: function(item, idx, removedCnt, addedCnt) {
    this.arrayContentDidChange(idx, removedCnt, addedCnt);
  },

  init: function() {
    this._super();
    this._setupContent();
    this._setupArrangedContent();
  },

  willDestroy: function() {
    this._teardownArrangedContent();
    this._teardownContent();
  }
});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get,
    set = Ember.set,
    fmt = Ember.String.fmt,
    addBeforeObserver = Ember.addBeforeObserver,
    addObserver = Ember.addObserver,
    removeBeforeObserver = Ember.removeBeforeObserver,
    removeObserver = Ember.removeObserver,
    propertyWillChange = Ember.propertyWillChange,
    propertyDidChange = Ember.propertyDidChange;

function contentPropertyWillChange(content, contentKey) {
  var key = contentKey.slice(8); // remove "content."
  if (key in this) { return; }  // if shadowed in proxy
  propertyWillChange(this, key);
}

function contentPropertyDidChange(content, contentKey) {
  var key = contentKey.slice(8); // remove "content."
  if (key in this) { return; } // if shadowed in proxy
  propertyDidChange(this, key);
}

/**
  `Ember.ObjectProxy` forwards all properties not defined by the proxy itself
  to a proxied `content` object.

      object = Ember.Object.create({
        name: 'Foo'
      });
      proxy = Ember.ObjectProxy.create({
        content: object
      });

      // Access and change existing properties
      proxy.get('name') // => 'Foo'
      proxy.set('name', 'Bar');
      object.get('name') // => 'Bar'

      // Create new 'description' property on `object`
      proxy.set('description', 'Foo is a whizboo baz');
      object.get('description') // => 'Foo is a whizboo baz'

  While `content` is unset, setting a property to be delegated will throw an Error.

      proxy = Ember.ObjectProxy.create({
        content: null,
        flag: null
      });
      proxy.set('flag', true);
      proxy.get('flag'); // => true
      proxy.get('foo'); // => undefined
      proxy.set('foo', 'data'); // throws Error

  Delegated properties can be bound to and will change when content is updated.

  Computed properties on the proxy itself can depend on delegated properties.

      ProxyWithComputedProperty = Ember.ObjectProxy.extend({
        fullName: function () {
          var firstName = this.get('firstName'),
              lastName = this.get('lastName');
          if (firstName && lastName) {
            return firstName + ' ' + lastName;
          }
          return firstName || lastName;
        }.property('firstName', 'lastName')
      });
      proxy = ProxyWithComputedProperty.create();
      proxy.get('fullName'); => undefined
      proxy.set('content', {
        firstName: 'Tom', lastName: 'Dale'
      }); // triggers property change for fullName on proxy
      proxy.get('fullName'); => 'Tom Dale'

  @class ObjectProxy
  @namespace Ember
  @extends Ember.Object
*/
Ember.ObjectProxy = Ember.Object.extend(
/** @scope Ember.ObjectProxy.prototype */ {
  /**
    The object whose properties will be forwarded.

    @property content
    @type Ember.Object
    @default null
  */
  content: null,
  _contentDidChange: Ember.observer(function() {
    Ember.assert("Can't set ObjectProxy's content to itself", this.get('content') !== this);
  }, 'content'),

  willWatchProperty: function (key) {
    var contentKey = 'content.' + key;
    addBeforeObserver(this, contentKey, null, contentPropertyWillChange);
    addObserver(this, contentKey, null, contentPropertyDidChange);
  },

  didUnwatchProperty: function (key) {
    var contentKey = 'content.' + key;
    removeBeforeObserver(this, contentKey, null, contentPropertyWillChange);
    removeObserver(this, contentKey, null, contentPropertyDidChange);
  },

  unknownProperty: function (key) {
    var content = get(this, 'content');
    if (content) {
      return get(content, key);
    }
  },

  setUnknownProperty: function (key, value) {
    var content = get(this, 'content');
    Ember.assert(fmt("Cannot delegate set('%@', %@) to the 'content' property of object proxy %@: its 'content' is undefined.", [key, value, this]), content);
    return set(content, key, value);
  }
});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var set = Ember.set, get = Ember.get, guidFor = Ember.guidFor;
var forEach = Ember.EnumerableUtils.forEach;

var EachArray = Ember.Object.extend(Ember.Array, {

  init: function(content, keyName, owner) {
    this._super();
    this._keyName = keyName;
    this._owner   = owner;
    this._content = content;
  },

  objectAt: function(idx) {
    var item = this._content.objectAt(idx);
    return item && get(item, this._keyName);
  },

  length: Ember.computed(function() {
    var content = this._content;
    return content ? get(content, 'length') : 0;
  }).property().cacheable()

});

var IS_OBSERVER = /^.+:(before|change)$/;

function addObserverForContentKey(content, keyName, proxy, idx, loc) {
  var objects = proxy._objects, guid;
  if (!objects) objects = proxy._objects = {};

  while(--loc>=idx) {
    var item = content.objectAt(loc);
    if (item) {
      Ember.addBeforeObserver(item, keyName, proxy, 'contentKeyWillChange');
      Ember.addObserver(item, keyName, proxy, 'contentKeyDidChange');

      // keep track of the indicies each item was found at so we can map
      // it back when the obj changes.
      guid = guidFor(item);
      if (!objects[guid]) objects[guid] = [];
      objects[guid].push(loc);
    }
  }
}

function removeObserverForContentKey(content, keyName, proxy, idx, loc) {
  var objects = proxy._objects;
  if (!objects) objects = proxy._objects = {};
  var indicies, guid;

  while(--loc>=idx) {
    var item = content.objectAt(loc);
    if (item) {
      Ember.removeBeforeObserver(item, keyName, proxy, 'contentKeyWillChange');
      Ember.removeObserver(item, keyName, proxy, 'contentKeyDidChange');

      guid = guidFor(item);
      indicies = objects[guid];
      indicies[indicies.indexOf(loc)] = null;
    }
  }
}

/**
  This is the object instance returned when you get the @each property on an
  array.  It uses the unknownProperty handler to automatically create
  EachArray instances for property names.

  @private
  @class EachProxy
  @namespace Ember
  @extends Ember.Object
*/
Ember.EachProxy = Ember.Object.extend({

  init: function(content) {
    this._super();
    this._content = content;
    content.addArrayObserver(this);

    // in case someone is already observing some keys make sure they are
    // added
    forEach(Ember.watchedEvents(this), function(eventName) {
      this.didAddListener(eventName);
    }, this);
  },

  /**
    You can directly access mapped properties by simply requesting them.
    The unknownProperty handler will generate an EachArray of each item.

    @method unknownProperty
    @param keyName {String}
    @param value {anything}
  */
  unknownProperty: function(keyName, value) {
    var ret;
    ret = new EachArray(this._content, keyName, this);
    Ember.defineProperty(this, keyName, null, ret);
    this.beginObservingContentKey(keyName);
    return ret;
  },

  // ..........................................................
  // ARRAY CHANGES
  // Invokes whenever the content array itself changes.

  arrayWillChange: function(content, idx, removedCnt, addedCnt) {
    var keys = this._keys, key, array, lim;

    lim = removedCnt>0 ? idx+removedCnt : -1;
    Ember.beginPropertyChanges(this);

    for(key in keys) {
      if (!keys.hasOwnProperty(key)) { continue; }

      if (lim>0) removeObserverForContentKey(content, key, this, idx, lim);

      Ember.propertyWillChange(this, key);
    }

    Ember.propertyWillChange(this._content, '@each');
    Ember.endPropertyChanges(this);
  },

  arrayDidChange: function(content, idx, removedCnt, addedCnt) {
    var keys = this._keys, key, array, lim;

    lim = addedCnt>0 ? idx+addedCnt : -1;
    Ember.beginPropertyChanges(this);

    for(key in keys) {
      if (!keys.hasOwnProperty(key)) { continue; }

      if (lim>0) addObserverForContentKey(content, key, this, idx, lim);

      Ember.propertyDidChange(this, key);
    }

    Ember.propertyDidChange(this._content, '@each');
    Ember.endPropertyChanges(this);
  },

  // ..........................................................
  // LISTEN FOR NEW OBSERVERS AND OTHER EVENT LISTENERS
  // Start monitoring keys based on who is listening...

  didAddListener: function(eventName) {
    if (IS_OBSERVER.test(eventName)) {
      this.beginObservingContentKey(eventName.slice(0, -7));
    }
  },

  didRemoveListener: function(eventName) {
    if (IS_OBSERVER.test(eventName)) {
      this.stopObservingContentKey(eventName.slice(0, -7));
    }
  },

  // ..........................................................
  // CONTENT KEY OBSERVING
  // Actual watch keys on the source content.

  beginObservingContentKey: function(keyName) {
    var keys = this._keys;
    if (!keys) keys = this._keys = {};
    if (!keys[keyName]) {
      keys[keyName] = 1;
      var content = this._content,
          len = get(content, 'length');
      addObserverForContentKey(content, keyName, this, 0, len);
    } else {
      keys[keyName]++;
    }
  },

  stopObservingContentKey: function(keyName) {
    var keys = this._keys;
    if (keys && (keys[keyName]>0) && (--keys[keyName]<=0)) {
      var content = this._content,
          len     = get(content, 'length');
      removeObserverForContentKey(content, keyName, this, 0, len);
    }
  },

  contentKeyWillChange: function(obj, keyName) {
    Ember.propertyWillChange(this, keyName);
  },

  contentKeyDidChange: function(obj, keyName) {
    Ember.propertyDidChange(this, keyName);
  }

});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set;

// Add Ember.Array to Array.prototype.  Remove methods with native
// implementations and supply some more optimized versions of generic methods
// because they are so common.
var NativeArray = Ember.Mixin.create(Ember.MutableArray, Ember.Observable, Ember.Copyable, {

  // because length is a built-in property we need to know to just get the
  // original property.
  get: function(key) {
    if (key==='length') return this.length;
    else if ('number' === typeof key) return this[key];
    else return this._super(key);
  },

  objectAt: function(idx) {
    return this[idx];
  },

  // primitive for array support.
  replace: function(idx, amt, objects) {

    if (this.isFrozen) throw Ember.FROZEN_ERROR ;

    // if we replaced exactly the same number of items, then pass only the
    // replaced range.  Otherwise, pass the full remaining array length
    // since everything has shifted
    var len = objects ? get(objects, 'length') : 0;
    this.arrayContentWillChange(idx, amt, len);

    if (!objects || objects.length === 0) {
      this.splice(idx, amt) ;
    } else {
      var args = [idx, amt].concat(objects) ;
      this.splice.apply(this,args) ;
    }

    this.arrayContentDidChange(idx, amt, len);
    return this ;
  },

  // If you ask for an unknown property, then try to collect the value
  // from member items.
  unknownProperty: function(key, value) {
    var ret;// = this.reducedProperty(key, value) ;
    if ((value !== undefined) && ret === undefined) {
      ret = this[key] = value;
    }
    return ret ;
  },

  // If browser did not implement indexOf natively, then override with
  // specialized version
  indexOf: function(object, startAt) {
    var idx, len = this.length;

    if (startAt === undefined) startAt = 0;
    else startAt = (startAt < 0) ? Math.ceil(startAt) : Math.floor(startAt);
    if (startAt < 0) startAt += len;

    for(idx=startAt;idx<len;idx++) {
      if (this[idx] === object) return idx ;
    }
    return -1;
  },

  lastIndexOf: function(object, startAt) {
    var idx, len = this.length;

    if (startAt === undefined) startAt = len-1;
    else startAt = (startAt < 0) ? Math.ceil(startAt) : Math.floor(startAt);
    if (startAt < 0) startAt += len;

    for(idx=startAt;idx>=0;idx--) {
      if (this[idx] === object) return idx ;
    }
    return -1;
  },

  copy: function() {
    return this.slice();
  }
});

// Remove any methods implemented natively so we don't override them
var ignore = ['length'];
Ember.EnumerableUtils.forEach(NativeArray.keys(), function(methodName) {
  if (Array.prototype[methodName]) ignore.push(methodName);
});

if (ignore.length>0) {
  NativeArray = NativeArray.without.apply(NativeArray, ignore);
}

/**
  The NativeArray mixin contains the properties needed to to make the native
  Array support Ember.MutableArray and all of its dependent APIs.  Unless you
  have Ember.EXTEND_PROTOTYPES or Ember.EXTEND_PROTOTYPES.Array set to false, this
  will be applied automatically. Otherwise you can apply the mixin at anytime by
  calling `Ember.NativeArray.activate`.

  @class NativeArray
  @namespace Ember
  @extends Ember.Mixin
  @uses Ember.MutableArray
  @uses Ember.MutableEnumerable
  @uses Ember.Copyable
  @uses Ember.Freezable
*/
Ember.NativeArray = NativeArray;

/**
  Creates an Ember.NativeArray from an Array like object.
  Does not modify the original object.

  @method A
  @for Ember
  @return {Ember.NativeArray}
*/
Ember.A = function(arr){
  if (arr === undefined) { arr = []; }
  return Ember.NativeArray.apply(arr);
};

/**
  Activates the mixin on the Array.prototype if not already applied.  Calling
  this method more than once is safe.

  @method activate
  @for Ember.NativeArray
  @static
  @return {void}
*/
Ember.NativeArray.activate = function() {
  NativeArray.apply(Array.prototype);

  Ember.A = function(arr) { return arr || []; };
};

if (Ember.EXTEND_PROTOTYPES === true || Ember.EXTEND_PROTOTYPES.Array) {
  Ember.NativeArray.activate();
}

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set;

Ember._PromiseChain = Ember.Object.extend({
  promises: null,
  failureCallback: Ember.K,
  successCallback: Ember.K,
  abortCallback: Ember.K,
  promiseSuccessCallback: Ember.K,

  runNextPromise: function() {
    if (get(this, 'isDestroyed')) { return; }

    var item = get(this, 'promises').shiftObject();
    if (item) {
      var promise = get(item, 'promise') || item;
      Ember.assert("Cannot find promise to invoke", Ember.canInvoke(promise, 'then'));

      var self = this;

      var successCallback = function() {
        self.promiseSuccessCallback.call(this, item, arguments);
        self.runNextPromise();
      };

      var failureCallback = get(self, 'failureCallback');

      promise.then(successCallback, failureCallback);
     } else {
      this.successCallback();
    }
  },

  start: function() {
    this.runNextPromise();
    return this;
  },

  abort: function() {
    this.abortCallback();
    this.destroy();
  },

  init: function() {
    set(this, 'promises', Ember.A(get(this, 'promises')));
    this._super();
  }
});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var loadHooks = {};
var loaded = {};

/**
@method onLoad
@for Ember
@param name {String} name of hook
@param callback {Function} callback to be called
*/
Ember.onLoad = function(name, callback) {
  var object;

  loadHooks[name] = loadHooks[name] || Ember.A();
  loadHooks[name].pushObject(callback);

  if (object = loaded[name]) {
    callback(object);
  }
};

/**
@method runLoadHooks
@for Ember
@param name {String} name of hook
@param object {Object} object to pass to callbacks
*/
Ember.runLoadHooks = function(name, object) {
  var hooks;

  loaded[name] = object;

  if (hooks = loadHooks[name]) {
    loadHooks[name].forEach(function(callback) {
      callback(object);
    });
  }
};

})();

(function() {

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

/**
  Ember.ControllerMixin provides a standard interface for all classes
  that compose Ember's controller layer: Ember.Controller, Ember.ArrayController,
  and Ember.ObjectController.

  Within an Ember.Router-managed application single shared instaces of every
  Controller object in your application's namespace will be added to the
  application's Ember.Router instance. See `Ember.Application#initialize`
  for additional information.

  ## Views
  By default a controller instance will be the rendering context
  for its associated Ember.View. This connection is made during calls to
  `Ember.ControllerMixin#connectOutlet`.

  Within the view's template, the Ember.View instance can be accessed
  through the controller with `{{view}}`.

  ## Target Forwarding
  By default a controller will target your application's Ember.Router instance.
  Calls to `{{action}}` within the template of a controller's view are forwarded
  to the router. See `Ember.Handlebars.helpers.action` for additional information.

  @class ControllerMixin
  @namespace Ember
  @extends Ember.Mixin
*/
Ember.ControllerMixin = Ember.Mixin.create({
  /**
    The object to which events from the view should be sent.

    For example, when a Handlebars template uses the `{{action}}` helper,
    it will attempt to send the event to the view's controller's `target`.

    By default, a controller's `target` is set to the router after it is
    instantiated by `Ember.Application#initialize`.

    @property target
    @default null
  */
  target: null,

  store: null
});

/**
  @class Controller
  @namespace Ember
  @extends Ember.Object
  @uses Ember.ControllerMixin
*/
Ember.Controller = Ember.Object.extend(Ember.ControllerMixin);

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set, forEach = Ember.EnumerableUtils.forEach;

/**
  Ember.SortableMixin provides a standard interface for array proxies
  to specify a sort order and maintain this sorting when objects are added,
  removed, or updated without changing the implicit order of their underlying
  content array:

      songs = [
        {trackNumber: 4, title: 'Ob-La-Di, Ob-La-Da'},
        {trackNumber: 2, title: 'Back in the U.S.S.R.'},
        {trackNumber: 3, title: 'Glass Onion'},
      ];

      songsController = Ember.ArrayController.create({
        content: songs,
        sortProperties: ['trackNumber']
      });

      songsController.get('firstObject'); // {trackNumber: 2, title: 'Back in the U.S.S.R.'}

      songsController.addObject({trackNumber: 1, title: 'Dear Prudence'});
      songsController.get('firstObject'); // {trackNumber: 1, title: 'Dear Prudence'}

  @class SortableMixin
  @namespace Ember
  @extends Ember.Mixin
  @uses Ember.MutableEnumerable
*/
Ember.SortableMixin = Ember.Mixin.create(Ember.MutableEnumerable, {
  sortProperties: null,
  sortAscending: true,

  addObject: function(obj) {
    var content = get(this, 'content');
    content.pushObject(obj);
  },

  removeObject: function(obj) {
    var content = get(this, 'content');
    content.removeObject(obj);
  },

  orderBy: function(item1, item2) {
    var result = 0,
        sortProperties = get(this, 'sortProperties'),
        sortAscending = get(this, 'sortAscending');

    Ember.assert("you need to define `sortProperties`", !!sortProperties);

    forEach(sortProperties, function(propertyName) {
      if (result === 0) {
        result = Ember.compare(get(item1, propertyName), get(item2, propertyName));
        if ((result !== 0) && !sortAscending) {
          result = (-1) * result;
        }
      }
    });

    return result;
  },

  destroy: function() {
    var content = get(this, 'content'),
        sortProperties = get(this, 'sortProperties');

    if (content && sortProperties) {
      forEach(content, function(item) {
        forEach(sortProperties, function(sortProperty) {
          Ember.removeObserver(item, sortProperty, this, 'contentItemSortPropertyDidChange');
        }, this);
      }, this);
    }

    return this._super();
  },

  isSorted: Ember.computed('sortProperties', function() {
    return !!get(this, 'sortProperties');
  }),

  arrangedContent: Ember.computed('content', 'sortProperties.@each', function(key, value) {
    var content = get(this, 'content'),
        isSorted = get(this, 'isSorted'),
        sortProperties = get(this, 'sortProperties'),
        self = this;

    if (content && isSorted) {
      content = content.slice();
      content.sort(function(item1, item2) {
        return self.orderBy(item1, item2);
      });
      forEach(content, function(item) {
        forEach(sortProperties, function(sortProperty) {
          Ember.addObserver(item, sortProperty, this, 'contentItemSortPropertyDidChange');
        }, this);
      }, this);
      return Ember.A(content);
    }

    return content;
  }).cacheable(),

  _contentWillChange: Ember.beforeObserver(function() {
    var content = get(this, 'content'),
        sortProperties = get(this, 'sortProperties');

    if (content && sortProperties) {
      forEach(content, function(item) {
        forEach(sortProperties, function(sortProperty) {
          Ember.removeObserver(item, sortProperty, this, 'contentItemSortPropertyDidChange');
        }, this);
      }, this);
    }

    this._super();
  }, 'content'),

  sortAscendingWillChange: Ember.beforeObserver(function() {
    this._lastSortAscending = get(this, 'sortAscending');
  }, 'sortAscending'),

  sortAscendingDidChange: Ember.observer(function() {
    if (get(this, 'sortAscending') !== this._lastSortAscending) {
      var arrangedContent = get(this, 'arrangedContent');
      arrangedContent.reverseObjects();
    }
  }, 'sortAscending'),

  contentArrayWillChange: function(array, idx, removedCount, addedCount) {
    var isSorted = get(this, 'isSorted');

    if (isSorted) {
      var arrangedContent = get(this, 'arrangedContent');
      var removedObjects = array.slice(idx, idx+removedCount);
      var sortProperties = get(this, 'sortProperties');

      forEach(removedObjects, function(item) {
        arrangedContent.removeObject(item);

        forEach(sortProperties, function(sortProperty) {
          Ember.removeObserver(item, sortProperty, this, 'contentItemSortPropertyDidChange');
        }, this);
      });
    }

    return this._super(array, idx, removedCount, addedCount);
  },

  contentArrayDidChange: function(array, idx, removedCount, addedCount) {
    var isSorted = get(this, 'isSorted'),
        sortProperties = get(this, 'sortProperties');

    if (isSorted) {
      var addedObjects = array.slice(idx, idx+addedCount);
      var arrangedContent = get(this, 'arrangedContent');

      forEach(addedObjects, function(item) {
        this.insertItemSorted(item);

        forEach(sortProperties, function(sortProperty) {
          Ember.addObserver(item, sortProperty, this, 'contentItemSortPropertyDidChange');
        }, this);
      }, this);
    }

    return this._super(array, idx, removedCount, addedCount);
  },

  insertItemSorted: function(item) {
    var arrangedContent = get(this, 'arrangedContent');
    var length = get(arrangedContent, 'length');

    var idx = this._binarySearch(item, 0, length);
    arrangedContent.insertAt(idx, item);
  },

  contentItemSortPropertyDidChange: function(item) {
    var arrangedContent = get(this, 'arrangedContent'),
        oldIndex = arrangedContent.indexOf(item),
        newIndex = this._binarySearch(item, 0, get(arrangedContent, 'length'));

    if (newIndex !== oldIndex) {
      arrangedContent.removeObject(item);
      this.insertItemSorted(item);
    }
  },

  _binarySearch: function(item, low, high) {
    var mid, midItem, res, arrangedContent;

    if (low === high) {
      return low;
    }

    arrangedContent = get(this, 'arrangedContent');

    mid = low + Math.floor((high - low) / 2);
    midItem = arrangedContent.objectAt(mid);

    res = this.orderBy(midItem, item);

    if (res < 0) {
      return this._binarySearch(item, mid+1, high);
    } else if (res > 0) {
      return this._binarySearch(item, low, mid);
    }

    return mid;
  }
});

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

var get = Ember.get, set = Ember.set;

/**
  Ember.ArrayController provides a way for you to publish a collection of objects
  so that you can easily bind to the collection from a Handlebars #each helper,
  an Ember.CollectionView, or other controllers.

  The advantage of using an ArrayController is that you only have to set up
  your view bindings once; to change what's displayed, simply swap out the
  `content` property on the controller.

  For example, imagine you wanted to display a list of items fetched via an XHR
  request. Create an Ember.ArrayController and set its `content` property:

  ``` javascript
  MyApp.listController = Ember.ArrayController.create();

  $.get('people.json', function(data) {
    MyApp.listController.set('content', data);
  });
  ```

  Then, create a view that binds to your new controller:

  ``` handlebars
  {{#each MyApp.listController}}
    {{firstName}} {{lastName}}
  {{/each}}
  ```

  Although you are binding to the controller, the behavior of this controller
  is to pass through any methods or properties to the underlying array. This
  capability comes from `Ember.ArrayProxy`, which this class inherits from.

  Note: As of this writing, `ArrayController` does not add any functionality
  to its superclass, `ArrayProxy`. The Ember team plans to add additional
  controller-specific functionality in the future, e.g. single or multiple
  selection support. If you are creating something that is conceptually a
  controller, use this class.

  @class ArrayController
  @namespace Ember
  @extends Ember.ArrayProxy
  @uses Ember.SortableMixin
  @uses Ember.ControllerMixin
*/

Ember.ArrayController = Ember.ArrayProxy.extend(Ember.ControllerMixin,
  Ember.SortableMixin);

})();

(function() {
/**
@module ember
@submodule ember-runtime
*/

/**
  Ember.ObjectController is part of Ember's Controller layer. A single
  shared instance of each Ember.ObjectController subclass in your application's
  namespace will be created at application initialization and be stored on your
  application's Ember.Router instance.

  Ember.ObjectController derives its functionality from its superclass
  Ember.ObjectProxy and the Ember.ControllerMixin mixin.

  @class ObjectController
  @namespace Ember
  @extends Ember.ObjectProxy
  @uses Ember.ControllerMixin
**/
Ember.ObjectController = Ember.ObjectProxy.extend(Ember.ControllerMixin);

})();

(function() {

})();

(function() {
/**
Ember Runtime

@module ember
@submodule ember-runtime
@requires ember-metal
*/

})();

redpajama_set_name: RedPajamaGithub