Finish build wall and sprint skill
Merge remote-tracking branch 'origin/master'

Conflicts:
	core/src/th/ac/kmitl/it/mdp2014/zombierunner/entities/Player.java

	core/src/th/ac/kmitl/it/mdp2014/zombierunner/inputprocessors/PlayerInputProcessor.java

	core/src/th/ac/kmitl/it/mdp2014/zombierunner/managers/NetworkManager.java