-Added constructable solar arrays.

-Added a solar pack crate to order.
-Machines that have a use_power of 0 will no longer be turned off due to lack of power in the area.
-Fixed a bug with the solar computer not reconnecting to the powernet when dismantled and remantled.
-Increased the cap of crates to 30.
-Some performance tweaks.
-Some standardization.
-All objects of type /obj/machinery/power will try to disconnect from the powernet before deleting, this will help reduce the node list size.
-Added a heat_proof variable for doors. It will effect glass airlocks and it'll determine whether they can block heat or not. Research glass airlocks will always have it enabled.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@5344 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/power/smes.dm

@@ -10,6 +10,7 @@
 	icon_state = "smes"
 	density = 1
 	anchored = 1
+	use_power = 0
 	var/output = 50000
 	var/lastout = 0
 	var/loaddemand = 0