If a invited user accepts a cancelled invitation they are directed to a page telling them the invitation is cancelled.
Without this they were able to register and were added to the service.
register. On succesful register and verfication they
will be added to service and forwarded to dashboard.
Nothing is done yet with the permissions requested in the
invite to the user.
This commit only deals with acceptance by
users who are already in system.
Changed invite client to return invited user objects
instead of dictionaries.
Added commented out test. fixed up fixtures to return invited user
object for invites