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/vehicles/atv.dm

@@ -3,7 +3,7 @@
 	name = "all-terrain vehicle"
 	desc = "An all-terrain vehicle built for traversing rough terrain with ease. One of the few old-earth technologies that are still relevant on most planet-bound outposts."
 	icon_state = "atv"
-	var/static/image/atvcover = null
+	var/static/mutable_appearance/atvcover
 
 /obj/vehicle/atv/buckle_mob(mob/living/buckled_mob, force = 0, check_loc = 1)
 	. = ..()
@@ -11,9 +11,7 @@
 
 /obj/vehicle/atv/New()
 	..()
-	if(!atvcover)
-		atvcover = image("icons/obj/vehicles.dmi", "atvcover")
-		atvcover.layer = ABOVE_MOB_LAYER
+	atvcover = atvcover || mutable_appearance(icon, "atvcover", ABOVE_MOB_LAYER)
 
 
 /obj/vehicle/atv/post_buckle_mob(mob/living/M)

code/modules/vehicles/speedbike.dm

@@ -4,7 +4,7 @@
 	icon_state = "speedbike_blue"
 	layer = LYING_MOB_LAYER
 	var/overlay_state = "cover_blue"
-	var/image/overlay = null
+	var/static/mutable_appearance/overlay
 
 /obj/vehicle/space/speedbike/buckle_mob(mob/living/M, force = 0, check_loc = 1)
 	. = ..()
@@ -12,8 +12,7 @@
 
 /obj/vehicle/space/speedbike/New()
 	. = ..()
-	overlay = image("icons/obj/bike.dmi", overlay_state)
-	overlay.layer = ABOVE_MOB_LAYER
+	overlay = overlay ||  mutable_appearance(icon, overlay_state, ABOVE_MOB_LAYER)
 	add_overlay(overlay)
 
 /obj/effect/overlay/temp/speedbike_trail