Added a package method that returns shipping details and several new delegates.
Added tracking methods and invoked the attachment method on shipping label.
Removed country inputs. Hard coding them to Canada for now.
Added a link to the shipping label for an artwork. Still needs testing.
Moved/removed shipping label from Artwork to Payment.
Added tests for Shipping#rate! and cleaned up some shipping label testing.
Added FakeWeb entries for shipping label tests and restricted Artwork#destroy.
Removed Artwork#destroy from the routes.
Added Shipping#rate! and Shipping#get_label! methods.
Added a css class for verifying we see the success page in automated tests.
Added shipping label and tracking number generation/saving when purchasing art.
Disabling Most Fedex calls due to current service outages.