Adde checkout review view.  Fixes to templaes in several of the heckout views.
Removed checkout class decorators for Cart Data, Shipping Data, and use Mixins instead
cleanup extra comments in checkout
fix checkout template text
comment out functions to create order for now... will move to last step of order.
More cleanup of checkout class based views
  - move dispatch to a common base view
renamed checkout templates to start with a number
made the payment view a FormView
working on checkout view