Merge pull request #3 from aztectornado/master

Update to latest
Firedoor Update

Removed unused code
Converted all Firedoors to base instance /obj/machinery/door/firedoor
Added a lot of missing firedoors and a few air alarms

Yes this is mapmerged, but it's got about 800 tile changes so Git won't
display the map
Restored 2 wide firedoor
Merge pull request #73 from Maxis010/master

Firedoor Update