Updated functionality of menu options, save/load/quit/delete in GameManager
Fixed bug with deleteGame Menu option in GameFrame.java
Added setGamePanel(...) method to Game.java so that the gamePanel can be cleared when a user calls the deleteGame() method in GameManager which deletes the current game
Deleted setGamePanel method in Game.java since it didn't help with my problem. Also re-updating GameManager.java
Merge branch 'master' into meghan
Updated dialog boxes in quitGame() and deleteGame() in GameManager
Got rid of deleteGame() in GameManager since it is unnecessary functionality
Merge branch 'mauricio'

Conflicts:
	src/controllers/GameManager.java
Merge branch 'master' into mauricio