created a working gridview for the game screen activity
minimum working system demo
Repaired missing classes by copying them from jcoady9 on gitHub.
Merge remote-tracking branch 'jcoady9/master'

Conflicts:
	CS496_Project_App/gen/ycp/edu/cs496project/mobileApp/R.java
	CS496_Project_App/res/layout/activity_game_screen.xml
	CS496_Project_App/src/ycp/edu/cs496project/mobileApp/GameScreenActivity.java