Game Controller updates

+Exit Game, with confirmation dialog
+Save game option, with confirmation
+Countdown Timer
+Game Paused when Menu opened
+End of Day summary
+End of Game Summary
+Back button shows exit confirmation and goes back to main menu
+Business class object
Delete MainActivity.java
Merge branch 'MainMenu_Activity_Branch' into GameController_Branch

Conflicts:
	BusinessSim/src/com/game/businesssim/MainActivity.java