Added checkoutController

doesnt work yet but doesnt break soucre either
temp testing of checkout
Changed to port for matt's computer
Changes to JS files
Merge pull request #2 from simplyankush/ankush

Ankush
Cart and CartItem
Checkout template created and linked
Add cart items when clicking on price
Changes for Cart/CartItem in composition root
AddCartItem should work?
Testing
Merge branch 'ankush' of https://github.com/simplyankush/Heinz95729.git
Add Cart to User class
Partial draft of cart UI
Merge pull request #3 from simplyankush/ankush

Ankush
Chechout UI change
Merge pull request #4 from simplyankush/master

Pull code from master to Sahil