Purchasable items can now be consumable and not consumable. Consume coun...

...t could be set for consumables.

Consume count is decremented when user enters story after closet scene and after user enters eating screen.
For debugging consume count is displayed in Closet scene and on scene where you choose spoons and bowls. This feature may be removed in release by commenting out #define SHOW_CONSUME_COUNT line in BackgroundSelectionCell.h, CabinetCell.h and ClosetCell.h.
Because CoreData model was changed, next test build will crash if installed above previous version.