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.h
extern const char kNodeIntegration[];
extern const char kGuestInstanceID[];
extern const char kExperimentalFeatures[];
extern const char kExperimentalCanvasFeatures[];
extern const char kOpenerID[];
extern const char kBlinkFeatures[];
}   
namespace switches {
extern const char kEnablePlugins[];
extern const char kPpapiFlashPath[];
extern const char kPpapiFlashVersion[];
extern const char kDisableHttpCache[];
extern const char kRegisterStandardSchemes[];
extern const char kRegisterServiceWorkerSchemes[];
extern const char kSSLVersionFallbackMin[];
extern const char kCipherSuiteBlacklist[];
extern const char kAppUserModelId[];
extern const char kBackgroundColor[];
extern const char kZoomFactor[];
extern const char kPreloadScript[];
extern const char kPreloadURL[];
extern const char kNodeIntegration[];
extern const char kGuestInstanceID[];
extern const char kOpenerID[];
extern const char kWidevineCdmPath[];
extern const char kWidevineCdmVersion[];
}  
}  
#endif