Fix test description
Move related tests to be near
Add Order#authorize! and #authorized?
Make sure persisted invalid orders can not be authorized
Always use method accessors instead of []
Do not authorize for some cards on the black list
Use fetch instead of checking the key
Expires the keys every 30 days
Merge pull request #3 from Baby-com-br/rm-failure-authorization

Respond with authorization failure with some credit cards