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/modules/mining/ores_coins.dm

@@ -392,7 +392,7 @@
 			return
 
 		if (CC.use(1))
-			add_overlay(image('icons/obj/economy.dmi',"coin_string_overlay"))
+			add_overlay("coin_string_overlay")
 			string_attached = 1
 			to_chat(user, "<span class='notice'>You attach a string to the coin.</span>")
 		else