It doesn't look very good for "native" apps to overscroll when scrolling. Would be nice to have a BrowserWindow option to disable overscroll

![untitled12](https://cloud.githubusercontent.com/assets/170270/15033357/fc36e32e-1293-11e6-8cdc-6c17b0f504dd.gif)
## 
- Electron version: 0.37.8
- Operating system: OS X 10.11.4

atom/common/options_switches.cc
const char kNodeIntegration[] = "nodeIntegration";
const char kGuestInstanceID[] = "guestInstanceId";
const char kDirectWrite[] = "directWrite";
const char kExperimentalFeatures[]       = "experimentalFeatures";
const char kExperimentalCanvasFeatures[] = "experimentalCanvasFeatures";
const char kOpenerID[] = "openerId";
const char kBlinkFeatures[] = "blinkFeatures";
}  
namespace switches {
const char kEnablePlugins[] = "enable-plugins";
const char kPpapiFlashPath[] = "ppapi-flash-path";
const char kPpapiFlashVersion[] = "ppapi-flash-version";
const char kDisableHttpCache[] = "disable-http-cache";
const char kRegisterStandardSchemes[] = "register-standard-schemes";
const char kRegisterServiceWorkerSchemes[] = "register-service-worker-schemes";
const char kSSLVersionFallbackMin[] = "ssl-version-fallback-min";
const char kCipherSuiteBlacklist[] = "cipher-suite-blacklist";
const char kAppUserModelId[] = "app-user-model-id";
const char kBackgroundColor[] = "background-color";
const char kZoomFactor[]      = "zoom-factor";
const char kPreloadScript[]   = "preload";
const char kPreloadURL[]      = "preload-url";
const char kNodeIntegration[] = "node-integration";
const char kGuestInstanceID[] = "guest-instance-id";
const char kOpenerID[]        = "opener-id";
const char kWidevineCdmPath[] = "widevine-cdm-path";
const char kWidevineCdmVersion[] = "widevine-cdm-version";
}  
}