Main menu has music and can exit
Merge branch 'master' of https://github.com/Strap/battlepong

Conflicts:
	battle-pong-desktop/src/com/cs252/battlepong/Main.java
Merge branch 'master' of https://github.com/Strap/battlepong
Merge branch 'master' of https://github.com/Strap/battlepong