Add line_item unit tests
Update navbar styles
Merge branch 'master' into cart
Update schema with latest migrations
Add Cart::Null
Create a use case for fixing the cart/user relationships
Add styles to navbar links
Merge branch 'cart' of https://github.com/rNavarrete/dinner_dash_frita into cart

'Add styles to navbar, merge Josh changes'
Merge pull request #53 from rNavarrete/cart

Cart