Icon_override, Plasma weapon tweaks & gunlocker. AK-47 Summoning (#2759)

* In hands of plasma weapons/tweaks

* Icon override states for all clothes

* a few compile issues ~

* Adds a new badmin button and plasma rifle case

* better cleanup of the sound effect

* Oh, these should've been deleted already.

code/game/objects/items.dm

@@ -115,6 +115,8 @@ GLOBAL_VAR_INIT(rpg_loot_items, FALSE)
 
 	var/trigger_guard = TRIGGER_GUARD_NONE
 
+	var/icon_override = null
+
 /obj/item/Initialize()
 	if (!materials)
 		materials = list()