Airlock and APC changes.

- Added a debugger device that can figure out when an object has been hacked/emagged
- Hacked APCs no longer display blue screen
- You can now disassemble emagged airlocks, they will yield a fried airlock electronic.

code/game/objects/objs.dm

@@ -16,6 +16,8 @@
 	var/damtype = "brute"
 	var/force = 0
 
+/obj/item/proc/is_used_on(obj/O, mob/user)
+
 /obj/proc/process()
 	processing_objects.Remove(src)
 	return 0