dns: add a confirmation modal for deleting domain zones
apidoc: change inheritence and other settings for a new in-progress design for the apidoc
dns: Create an instance of the correct subclass of a ResponseAnnotation under edit_record
profile: add node name and service nickname to a users' service list
vps/signup: expired/invalid coupon codes now stop the transaction to tell the user they are invalid
apidoc: Add basic 'usage' page on how to use the API
account: display statistics about current promotions (this will always display any invoices with abnormal multipliers, but we can tweak the query to either time periods or numbers later on if we need to)
Merge pull request #28 from nasonfish/apidoc

apidoc: Various improvements to display and backend of apidoc