fixed fading
Merge branch 'master' into sound

Conflicts:
	gdx-bunny-brawl/src/main/java/de/hochschuletrier/gdw/ws1314/states/DualGamePlayState.java
Merge branch 'master' into sound
added gameplay music
searched for issue for 3 hours, did nothing
Merge branch 'sound'
Merge branch 'master' of https://github.com/hottehead/GameDevWeek