Start
addBt
InventoryPage
add Inventory, MockupInventory, Item Class
Merge branch 'master' of https://github.com/Bankking/MobilePOS.git

Conflicts:
	MobilePOS/gen/com/example/mobilepos/R.java
	MobilePOS/res/layout/activity_main.xml
add 
<<interface>> Inventory
MockupInventory
Item
===== Code =====
add inventory_additem
add InventoryAddMoreItemActivity
===== Layout =====
change activity_main > inventory_main
add inventory_additem.xml
change inventory_main.xml
update inventory_main.xml
edit inventory_main.xml
edit add more product UI
add InventoryAddMoreItemActivity to AndroidManifest.xml

add Intent goAddMoreProduct from inventory_additem to inventory_main
can add item into the inventory
can add another item's information: Price, Brand and Quantity 

edit inventory_additem.xml
inventory_additem.xml : remove reset button -> add cancel button
add item info
separate package
add SaleMainActivity.java

add sale_main.xml

add SaleSelectItemActivity.java

add sale_item_in_inventory.xml
update AndroidManifest.xml

edit SaleSelectItemActivity.java
fix bugs