Mostly removes creation of throwaway objects from chameleon items

- Replaces the creation of throwaway items from New() with initial() calls for all chameleon items.
- Unfortunately throwaway items could not be removed when switch appearance, as initial() does not work very will with list vars.
- Makes chameleon item name cache lists global.
- Makes chameleon guns a subtype of energy guns, removes chameleon magazines.
- Moves chameleon.dm to clothing module root
- Items without icon or icon_state are no longer selectable as chameleon appearances.
- Chameleon verbs go in their own panel.

code/modules/projectiles/ammunition/boxes.dm

@@ -192,33 +192,3 @@
 	max_ammo = 20
 	multiple_sprites = 1
 
-/obj/item/ammo_magazine/chameleon
-	name = "magazine (.45)"
-	icon_state = "45"
-	mag_type = MAGAZINE
-	caliber = ".45"
-	ammo_type = /obj/item/ammo_casing/chameleon
-	max_ammo = 7
-	multiple_sprites = 1
-	matter = list()
-
-/obj/item/ammo_magazine/chameleon/empty
-	initial_ammo = 0
-
-/*
-//unused garbage
-
-/obj/item/ammo_magazine/a418
-	name = "ammo box (.418)"
-	icon_state = "418"
-	ammo_type = "/obj/item/ammo_casing/a418"
-	max_ammo = 7
-	multiple_sprites = 1
-
-/obj/item/ammo_magazine/a666
-	name = "ammo box (.666)"
-	icon_state = "666"
-	ammo_type = "/obj/item/ammo_casing/a666"
-	max_ammo = 4
-	multiple_sprites = 1
-*/