TG: - Moved three (well two, one was doubled for some reason) screen/attackby()

procs to appear AFTER the screen object is defined. They were in a random file
instead of where the objects are. If you double-click and 'screen' object in the
object browser it now takes you to the definition instead of some random file.

- Clicking a grille with a glass or r-glass sheet in your hand, when the grille
is in one of your cardinal directions (North, south, east or west) will make you
start building a window. It takes 2s to build the window, which spawns
unfastened (same as when you create one.) This should make fixing damaged
grille-window combinations easier. If you are standing on a grille and click it
with a glass / r-glass sheet in your hand, the window will face the direction
you're currently facing.

Screenshot:
http://www.kamletos.si/placing%20windows%20on%20grilles.PNG
Revision: r3081
Author: 	 baloh.matevz

code/modules/mob/screen.dm

@@ -11,6 +11,11 @@
 	name = "close"
 	master = null
 
+/obj/screen/close/DblClick()
+	if (src.master)
+		src.master:close(usr)
+	return
+
 /obj/screen/grab
 	name = "grab"
 	master = null
@@ -19,6 +24,10 @@
 	name = "storage"
 	master = null
 
+/obj/screen/storage/attackby(W, mob/user as mob)
+	src.master.attackby(W, user)
+	return
+
 /obj/screen/zone_sel
 	name = "Damage Zone"
 	icon = 'zone_sel.dmi'