lchen59 paulkim6: added shop activity.

- Create new shop activity
- change action bar so that reward/shop are grouped together
lchen59 paulkim6: shop activity basic implementation
lchen59 paulkim6: shop item info dialog added
lchen59 paulkim6 created DB table, need the CRUD functions
lchen59 paulkim6 finished CRUD, needs tests
Merge pull request #4 from kevinwchen26/US13

ssong25 jcheng26: battle activity back in application.
lchen59 paulkim6 finished tests, needs an actual library
lchen59 paulkim6 added cost to DB and made some relevant changes
lchen59 paulkim6 finished Library
lchen59 paulkim small changes
Merge branch 'US15'

Conflicts:
	ToDoRPG/Android/NewToDoRPG/res/layout/shop_activity.xml
	ToDoRPG/Android/NewToDoRPG/res/values/strings.xml

ToDoRPG/Android/NewToDoRPG/src/com/cs429/todorpg/revised/BaseActivity.ja
va

ToDoRPG/Android/NewToDoRPG/src/com/cs429/todorpg/revised/MainActivity.ja
va

ToDoRPG/Android/NewToDoRPG/src/com/cs429/todorpg/revised/ShopActivity.ja
va

ToDoRPG/Android/NewToDoRPG/src/com/cs429/todorpg/revised/utils/Constants
.java

ToDoRPG/Android/NewToDoRPG/src/com/cs429/todorpg/revised/utils/SQLiteHel
per.java