Made mainmenu look nicer
Merge remote-tracking branch 'origin/master'
Hide system buttons while playing
Added correct color handling
Improved background look
Improved Raycasting
Merge remote-tracking branch 'origin/master'

Conflicts:
	res/layout/mainmenu.xml
	src/de/sopamo/triangula/android/GameGLSurfaceView.java
	src/de/sopamo/triangula/android/PGRenderer.java
	src/de/sopamo/triangula/android/game/GameImpl.java
Cleanup