Added formatting and total price to cart
Bugfix - Users can only destroy carts owned by them
Added partials and brought the cart over to the side bar
Added AJAX for cart update
Added js highlighting on adding item to cart
Added application view helper for displaying hidden fields, hiding cart when empty
Added basic coffeescript to allow product images to fire the add to cart button on click
Updated failing tests.. oops
Added functionality to allow user to decrease / remove products from cart