Outbound Alerts

In this version:

* Triggers:
  * ``'_'``: Meaning any event
  * ``new_alert``: Meaning "a new alert" or "a new event in a cleared alert"
  * ``{repeat, Count, Lapse}``: Meaning ``Count`` events for an alert in ``Lapse`` seconds

* Notifiers:
  * ``outbound_tt_notifier``
  * ``outbound_mailer``