Updated interface to be more consistent.
- (KINWebBrowserViewController *)rootWebBrowserViewController; has become - (KINWebBrowserViewController *)rootWebBrowser;

Improved KVO implementation to match NSHipster recommended pattern seen here: http://nshipster.com/key-value-observing/

Other basic code organization improvements.
Disabled animation of UIProgressView when progress decreases.
Added new back button and forward button images in @1x, @2x, and @3x resolutions. Full iPhone 6+ support.