scambra/devise_invitable — pull request #230 by tomgi (2012-08-17 19:46:24+00:00)
Title: Model observers should be notified in callbacks

I have following Observer for my `User` model
````ruby
class UserObserver < ActiveRecord::Observer
def before_invitation_accepted(user)
(...)
end

def after_invitation_accepted(user)
(...)
end
end
````

Those methods should be invoked with callbacks.