Replaces /image with /mutable_appearance (#556)

* Replaces /image with /mutable_appearance, where appropriate

* Update miscellaneous.dm

* Delete miscellaneous.dm.rej

* Delete pet.dm.rej

* Update pet.dm

* Update species.dm

* Update miscellaneous.dm

* Update species.dm

* Update miscellaneous.dm

* Delete species.dm.rej

* Update species.dm

pretty sure I got all the indentation correct THIS time, ffs

* Update species.dm

* Update species.dm

fucking tabs man, fucking tabs.

code/game/objects/items/weapons/storage/boxes.dm

@@ -38,7 +38,7 @@
 	. = ..()
 	if(illustration)
 		cut_overlays()
-		add_overlay(image('icons/obj/storage.dmi', "[illustration]"))
+		add_overlay(illustration)
 
 /obj/item/weapon/storage/box/attack_self(mob/user)
 	..()