To Do for Shop
==============

Cart:

1) proper unit tests
- Anonymous cart
- User's cart
- User's cart management


2) Merge cart
 status must be "saved" for target cart

3) Public Carts
- public carts must not leave status: "saved"
 (Create a copy? Ask user?)
- List recent public carts 
- Display public cart
- Login to copy public cart

4) Custom Attributes
- attributes for cart and items
- store and load attributes
- validation interface
- default values? 

5) Workflow
Add status "quote requested" and "quote sent"?

Event handler to implement custom workflow

6) Shop Admin
Process carts:
- make quotes
- review orders
- verify orders

7) Add "order" or  "request quote" Button
Wizard to complete cart (variations, quantities etc.)
- Add customer date (user data)
- Add addresses (deliver, bill, etc.)


8) User Cart Status
Allow user to follow "ordered" carts. View "quotes", order quoted carts, 
postpone carts,