Ton of mobile (iOS, Android) improvements: iOS + OpenGL3, Google Play Biling upgrade,

[DP News-Robot]

As we’re preparing to release Castle Model Viewer on iOS, we’ve done a number of improvements to our mobile support for both iOS and Android: With big thanks to Jan Adamec, we have: Upgraded our OpenGLES usage on iOS to OpenGES 3 (if only your system supports it; otherwise we still fallback to OpenGLES 2). …