Added quantity to line items
Combining product items in cart to remove duplicate items
End of iteration E1 -- not working to my satisfaction though
Changed link for home
Iteration E2 completed, however...
If I understood the text properly, this should have stopped the 302 errors, but they are still in the log files.
Carts can now be deleted
Removed notice when adding item to a cart.
Improved layout of cart
Added price into line model.
Added test cases
Refactor and corrected error