adds expectations sheet with base expectations left
deletes categories from edit items page
can see, add, and delete multiple categories from items
cannot add category to the same item multiple times
customer names appear on admin orders page
admin order details page shows user name, email and address if delivery
can retire items from admin side
retired items are not visible from the menu for non admin users
Users can now remove items from the cart
Merge branch 'cart' of https://github.com/MarcGarreau/grubhub_v2 into cart