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/lavaland/ruins/gym.dm

@@ -68,9 +68,8 @@
 		user.setDir(SOUTH)
 		user.Stun(4)
 		user.loc = src.loc
-		var/image/W = image('goon/icons/obj/fitness.dmi',"fitnessweight-w")
-		W.layer = WALL_OBJ_LAYER
-		add_overlay(W)
+		var/mutable_appearance/swole_overlay = mutable_appearance(icon, "fitnessweight-w", WALL_OBJ_LAYER)
+		add_overlay(swole_overlay)
 		var/bragmessage = pick("pushing it to the limit","going into overdrive","burning with determination","rising up to the challenge", "getting strong now","getting ripped")
 		user.visible_message("<B>[user] is [bragmessage]!</B>")
 		var/reps = 0
@@ -93,5 +92,5 @@
 		animate(user, pixel_y = 0, time = 3)
 		var/finishmessage = pick("You feel stronger!","You feel like you can take on the world!","You feel robust!","You feel indestructible!")
 		icon_state = "fitnessweight"
-		cut_overlay(W)
+		cut_overlay(swole_overlay)
 		to_chat(user, "[finishmessage]")