Added functionality to delete individual line items from cart
Fixed a typo in the line_items_controller
Moved the cart to application layout and created patials for cart and line_item
Redirected to store_url when an item is added to cart
Added AJAX functionality to Adding Item in cart
Added a class to the updated line item to highlight it
Added AJAX functionality on deleting line item
Added AJAX functionality on delete button on each line items
Added AJAX functionality on Empty Cart button
Hid cart using display none if cart is empty and used display block if not empty
Fixed errors and failures in unit/functionals tests