Changed the prison break event to affect the main brig!

Added a sprite for welded vents. (Original courtesy of Cheridan)
Added an overlay for connected canisters. (Thanks to ruarai)
Updated one of the AI statuses to be animated.
Fixed the original style hotkeys.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@2409 316c924e-a436-60f5-8080-3fe189b3f50e

code/ATMOSPHERICS/components/unary/vent_pump.dm

@@ -51,6 +51,9 @@
 			air_contents.volume = 1000
 
 	update_icon()
+		if(welded)
+			icon_state = "[level == 1 && istype(loc, /turf/simulated) ? "h" : "" ]weld"
+			return
 		if(on && !(stat & (NOPOWER|BROKEN)))
 			if(pump_direction)
 				icon_state = "[level == 1 && istype(loc, /turf/simulated) ? "h" : "" ]out"
@@ -236,6 +239,9 @@
 		return
 
 	hide(var/i) //to make the little pipe section invisible, the icon changes.
+		if(welded)
+			icon_state = "[i == 1 && istype(loc, /turf/simulated) ? "h" : "" ]weld"
+			return
 		if(on&&node)
 			if(pump_direction)
 				icon_state = "[i == 1 && istype(loc, /turf/simulated) ? "h" : "" ]out"
@@ -256,9 +262,11 @@
 					if(!welded)
 						user.visible_message("[user] welds the vent shut.", "You weld the vent shut.", "You hear welding.")
 						welded = 1
+						update_icon()
 					else
 						user.visible_message("[user] unwelds the vent.", "You unweld the vent.", "You hear welding.")
 						welded = 0
+						update_icon()
 				W:welding = 1
 			else
 				user << "\blue You need more welding fuel to complete this task."