- Added vent control to air alarms

- Added air filter pressure control and made N2O filtering a separate option
- Fixed gas sensor division by zero bug
- Some atmos changes
- Disease gib-loop debugging
- Moved alarms, scrubbers and vents initialization to more suitable place 

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@352 316c924e-a436-60f5-8080-3fe189b3f50e

code/game/master_controller.dm

@@ -44,6 +44,11 @@ datum/controller/game_controller
 		for(var/obj/machinery/atmospherics/machine in world)
 			machine.build_network()
 
+		world << "\red \b Initializing atmos machinery"
+		sleep(-1)
+
+		find_air_alarms()
+
 		world << "\red \b Initializations complete."