**Do you want to request a _feature_ or report a _bug_?**
Bug
**What is the current behavior?**
React at the beginning rounds `input[type=range]` value to 0 or 1, and then looks at step parameter which is 0.1 for example. The result is incorrect value of input after component mounts. When I put `value` attribute after `step` attributes, it works fine.
**If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar (template: https://jsfiddle.net/reactjs/69z2wepo/).**
Demo: https://jsfiddle.net/2Lm4gy5k/ Comment or uncomment line 13 and 14 to see the difference.

**What is the expected behavior?**
To always look at step parameter and then round the value (if required).
**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
v15.1.0 (Opera, Chrome, Firefox). 

Yes, works in v.0.14.0 (https://jsfiddle.net/wrcnLugd/)

var element = <input type="text" value="1" onChange={function() {}} />;
    var markup = ReactDOMServer.renderToString(element);
    var div = document.createElement('div');
    div.innerHTML = markup;
    expect(div.firstChild.getAttribute('value')).toBe('1');
    expect(div.firstChild.getAttribute('defaultValue')).toBe(null);
  });
  it('should render name attribute if it is supplied', function() {
    var container = document.createElement('div');
    var node = ReactDOM.render(<input type="text" name="name" />, container);
    expect(node.name).toBe('name');
    expect(container.firstChild.getAttribute('name')).toBe('name');
  });
  it('should render name attribute if it is supplied for SSR', function() {
    var element = <input type="text" name="name" />;
    var markup = ReactDOMServer.renderToString(element);
    var div = document.createElement('div');
    div.innerHTML = markup;
    expect(div.firstChild.getAttribute('name')).toBe('name');
  });
  it('should not render name attribute if it is not supplied', function() {
    var container = document.createElement('div');
    ReactDOM.render(<input type="text" />, container);
    expect(container.firstChild.getAttribute('name')).toBe(null);
  });
  it('should not render name attribute if it is not supplied for SSR', function() {
    var element = <input type="text" />;
    var markup = ReactDOMServer.renderToString(element);
    var div = document.createElement('div');
    div.innerHTML = markup;