Lighting overhaul.

This commit overhauls the lighting system to Bay12 standards. It is better
in pretty much every way.

code/modules/computer3/networking.dm

@@ -143,10 +143,9 @@
 		if(typekey == null)
 			typekey = /obj/machinery
 		var/list/machines = list()
-		for(var/area/area in A.related)
-			for(var/obj/O in area.contents)
-				if(istype(O,typekey))
-					machines |= O
+		for(var/obj/O in A.contents)
+			if(istype(O,typekey))
+				machines |= O
 		return machines
 	verify_machine(var/obj/previous)
 		if(!previous) return 0