Remove extra link to cart
Add link to view shopping cart
Fix issue with rake seed:reset task

Task threw an error because user records
were not being deleted.
Add checkout with basic summary
Add address model
Add address form to checkout
Add support for addresses during checkout
Clean up the calculation of total in cart
Change if to unless for readability
Checkout summary now uses locals
Address params logic now extracted to a method
Addresses during checkout are now linked to users
Merge pull request #2 from danshultz/checkout

Checkout