ShoppingCart enhancements:
	- Checkout exists, needs tax/shipping/order id generation done properly (uses dummy values for now)
	- Checkout needs to generate PO xml file and store it somewhere (exact location undecided)
Merge branch 'ajturner'

* ajturner:
  ShoppingCart enhancements: 	- Checkout exists, needs tax/shipping/order id generation done properly (uses dummy values for now) 	- Checkout needs to generate PO xml file and store it somewhere (exact location undecided)