User Story 30, Order Update and Delete

[memcmahon]

As a visitor
When I check out
I see a flash message with a randomly generated, 10 digit verification code associated with that order

I can use that verification code to search for an order through the nav bar.
If an order is found, I am redirected to a verified order page ('/verified_order')
On that verified order page, I can:
- click a link to delete the order
- update the shipping address for an order
- remove items from the order

Checklist:

• base tests are written
• base code is written to pass tests
• edge case ("sad path") tests written (if required)
• edge case code written (if required)
• code is tested in development
• code is reviewed
• branch is merged
• all tests still pass

child of #4

child of #37