Adding coverage for origin conversion to Location objects
Base implementation
Added rating
Added address validation
Added shipping labels
Added purchase postage
Added tracking
UPS: Handle delivery not being most recent event.
return false for canned_address_verification_works? if login is nil
Merge pull request #149 from Shopify/fix_nomethoderror_empty_usps_login

USPS: Return false for canned_address_verification_works? if login is nil
Simplify logic, pretty-print xml
Merge remote-tracking branch 'shopify/master' into canada_post_fix
Updating Canada Post test based on PR feedback

After a little bit of discussion, we have decided that
checking the String nature of these properties provide
little value and can be removed.
Merge pull request #146 from akeem/canada_post_fix

Ensure that city, province, and address returned from Canada post are indeed Strings
Merge pull request #148 from jamuraa/delivery-status-not-most-recent

UPS: Handle delivery not being most recent event.
Merge pull request #147 from smartacus/stamps_integration

Stamps integration