Fixed disposal issue.

Delayed Jungle setup until after air master initializes
Master controller now properly ceases atmos simulation if runtimes occur (and are detected).
Cleanup more ZAS stuff.  FEA_system.dm, ZAS/ZAS_Turfs.dm, ZAS_Zones.dm.
Canisters now autoconnect to portables connectors on creation.   (Fixes airlocks not having attached canisters)
Doors can now be made which respect directional door types (e.g. windoors and directional firelocks) and is handled better.

code/ZAS/Connection.dm

@@ -83,12 +83,12 @@ connection
 			if(A.zone && A.zone.connections)
 				A.zone.connections.Remove(src)
 				if(!A.zone.connections.len)
-					del A.zone.connections
+					A.zone.connections = null
 		if(B)
 			if(B.zone && B.zone.connections)
 				B.zone.connections.Remove(src)
 				if(!B.zone.connections.len)
-					del B.zone.connections
+					B.zone.connections = null
 
 		//Disconnect zones while handling unusual conditions.
 		//	e.g. loss of a zone on a turf
@@ -333,7 +333,7 @@ connection
 				if(zone_A.connections)
 					zone_A.connections.Remove(src)
 					if(!zone_A.connections.len)
-						del zone_A.connections
+						zone_A.connections = null
 
 			if(A.zone)
 				if(!A.zone.connections)
@@ -360,7 +360,7 @@ connection
 				if(zone_B.connections)
 					zone_B.connections.Remove(src)
 					if(!zone_B.connections.len)
-						del zone_B.connections
+						zone_B.connections = null
 
 			if(B.zone)
 				if(!B.zone.connections)