Updades promise handling for Checkout.complete
Renamed CreditCard.cvv to CreditCard.cvc
Added checkouts/quick_update rails action
Removed unused CreditCard.serialize()
Fixed bug with cc attributes causing 500 error
Added taxTotal to order model
Added shipmentState to order model
Added order status to orders/index
Added logic to extend orders into Sprangular.Order model
Updated links in checkout nav
Added logic to use Cart.lastOrder in /checkout/complete and clear in /checkout
Removed hardcoded state=confirm parameter
Renamed Checkout.finalize() to Checkout.complete()