Add footsteps and tree thunk
Merge remote-tracking branch 'origin/master'

Conflicts:
	ggj2013/src/com/samphippen/games/ggj2013/ObstacleObject.java
	ggj2013/src/com/samphippen/games/ggj2013/PlayerObject.java
Fiddling of constants
Merge remote-tracking branch 'origin/master'