Updated audio stuff with lots of fixes and added placeholder music
Fixes to audio player when reseting a level
Stopped some delegates being subscribed to many times when reseting a level
Optimizations to audio controller
Improved level intro a bit
Tweaked physics materials and sound when hitting wall
Tidied up code a bit
fixed a bug in into AI
Merge branch 'master' of github.com:timsk159/CubePuzzle

Conflicts:
	Assets/Scenes/FrontMenu.unity