Added music and sfx
Merge branch 'develop' of https://github.com/ggj/ggj13 into develop

Conflicts:
	game_skel.pro
	resources/scenes/game.scene
	source/scenes/game_scene.cpp
	source/scenes/game_scene.h
Merge branch 'develop' of https://github.com/ggj/ggj13 into develop

Conflicts:
	game_skel.pro.user
	source/scenes/game_scene.cpp