Adds clear list function
destroys dependent list_ingredients but leaves list_recipes table non-destroyed due to naming error
Creates cupboard and validates presence of user id
Adds cupboard ingredients and begins the process of migrating shopping_list data to cupboard data in the model
creates find cu method and begins breaking down the migrate for quantity
Punts ingredient calculations off - creates rescue error for migrating shopping list
Updates and creates show methods for cupboards and shopping lists and gives an error message response