Refactored some user notifications to use a single method. Fixed credits notification being sent only once (notify_once always would find a match after first message).
Added user_deactivate notification placeholder text
User#deactivate now generates a reactivate_token for future reactivation
Created User#reactivate method
Adding reactivate action in users_controller with user_deactivate notification placeholder [13120030]
fixing spec for user observer and fixing parameters on notify call in User#notify
Fixing subscriber_report spces. Before all makes it inmpossible to run individual specs.
Merge pull request #723 from diogob/user_deactivation_notification

User deactivation notification