Added new songs for menu music.

Fixed an issue where character select wouldn't turn the background green upon going back to the main menu from a different scene
Merge branch 'master' of https://github.com/RobbSteel/Lords-of-Distortion

Conflicts:
	Lords-of-Distortion/Assets/Scenes/Tutorial Levels/Tutorial_Menu.unity
Put new menu music back into tutorial menu
Merge branch 'master' of https://github.com/RobbSteel/Lords-of-Distortion