music playback and audio resources
fix missing defaults on fade and stuff
Merge commit '6df258311621084d8a102b5bd0a590cea84a98df' into feature/add_music_and_sound

Conflicts:
	Assets/game/Game.unity
Merge commit 'dcbef579a55eb31931e5f52ffaf585cdcae92f81' into feature/add_music_and_sound
remove metafiles with no friends
Merge branch 'feature/add_music_and_sound' into develop