Changed testUi_ClickingAListItem_StartsDetailActivity to catch a GOTCHA - when some listView items are focusable, it prevents onListItemClick from firing
   - Changed the CheckBox to focusable="false"
Added getConsumable to GroceryListInteractor
Added UUID for Consumables
Clicking a list item takes you to the Details page (Edit)
Added functional test for editing an item (Commented out. Resume point for next coding time)