Basic input validation for SellActivity. Fixed crash when more than 8 items.
Merge branch 'master' of https://github.com/shalvin/IronBark-Development
Merging commit with input validation for SaleActivity
Conflicts:
	.idea/workspace.xml
	StudentSaleApp/src/com/studentsaleapp/activities/MainBuyActivity.java
	StudentSaleApp/src/com/studentsaleapp/activities/SellActivity.java