Created functional model for shopping lists
Started working on views and controllers
Merge branch 'shoppingListsTest' of https://github.com/pmrazovic/konzum-social into shoppingListsTest

Conflicts:
	db/schema.rb
Partially completed view
Controller and views mostly finished

TODO:
- modal dialog
- fix bug with list_users creation
ShoppingLists finished 95%

TODO:
- only show for shopping_lists missing
Shopping lists should be completely finished

- fixed a bug with adding all to cart in recipes and shopping lists
Merge branch 'master' of https://github.com/pmrazovic/konzum-social