Baystation12/Baystation12 — pull request #1496 by Strumpetplaya (2012-07-20 12:26:38+00:00)
Title: Re-added atmos lockdowns and fixed two bugs with them.

- Doors that are open when a lockdown occurs should no longer have their
access permanently require engineering access.
- Doors that are open when a lockdown is cancelled should no longer be
stuck in a lockdown state.

Still known bug - Doors that are locked down by two different alarms will
lose lockdown status if only one of the alarms is cancelled. Will get to this
one later. It requires more work than just correcting someone else's minor
mistakes, but at least atmos lockdowns are no longer potentially game-
breaking.