Fixed internal storage, added coat pockets

/mob/proc/ClickOn() now checks storage levels, not just contents levels,
now allows items to be taken out of internal storage attached to another
item.
Coats now use internal storage for their pocket slots, removed duplicate
storage code.
Moved coat.dm out of it's special folder and into modules/clothing.

code/modules/clothing/suits/storage.dm

@@ -0,0 +1,29 @@
+/obj/item/clothing/suit/storage
+	var/obj/item/weapon/storage/internal/pockets
+
+/obj/item/clothing/suit/storage/New()
+	..()
+	pockets = new/obj/item/weapon/storage/internal(src)
+	pockets.storage_slots = 2	//two slots
+	pockets.max_w_class = 2		//fit only pocket sized items
+	pockets.max_combined_w_class = 4
+
+/obj/item/clothing/suit/storage/attack_hand(mob/user as mob)
+	if (pockets.handle_attack_hand(user))
+		..(user)
+
+/obj/item/clothing/suit/storage/MouseDrop(obj/over_object as obj)
+	if (pockets.handle_mousedrop(usr, over_object))
+		..(over_object)
+
+/obj/item/clothing/suit/storage/attackby(obj/item/W as obj, mob/user as mob)
+	..()
+	pockets.attackby(W, user)
+
+/obj/item/clothing/suit/storage/emp_act(severity)
+	pockets.emp_act(severity)
+	..()
+
+/obj/item/clothing/suit/storage/hear_talk(mob/M, var/msg)
+	pockets.hear_talk(M, msg)
+	..()