Do more clean up
Merge from Avery's changes
Merge branch 'master' of github.com:sharlwong/pong
Merge branch 'master' of github.com:sharlwong/pong

Conflicts:
	Pong/bin/com/sutd/GameWorld/GameRenderer.class
	Pong/bin/com/sutd/PongHelpers/Constants.class
	Pong/src/com/sutd/GameWorld/GameRenderer.java
Merge branch 'master' of github.com:sharlwong/pong