iOS 8 with Xcode 6 support + fixes for both Android and iOS.

* iOS: GameThrive now runs on iOS 8 if built with Xcode 6.
* iOS & Android: Fixed issue where user would get interrupted if a url was set to open on the push notification.
* Android: Fixed issue where the default proguard configuration would not work with the jar.
* Android: Fixed bug where hard coding android:label instead of using "@string/app_name" in the application tag in AndroidManifest.xml would cause a crash when a notification was received.