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/grenades/plastic.dm

@@ -7,7 +7,7 @@
 	det_time = 10
 	display_timer = 0
 	var/atom/target = null
-	var/image_overlay = null
+	var/mutable_appearance/plastic_overlay
 	var/obj/item/device/assembly_holder/nadeassembly = null
 	var/assemblyattacher
 	var/directional = FALSE
@@ -15,7 +15,7 @@
 	var/boom_sizes = list(0, 0, 3)
 
 /obj/item/weapon/grenade/plastic/New()
-	image_overlay = image('icons/obj/grenade.dmi', "[item_state]2")
+	plastic_overlay = mutable_appearance(icon, "[item_state]2")
 	..()
 
 /obj/item/weapon/grenade/plastic/Destroy()
@@ -50,7 +50,7 @@
 	if(target)
 		if(!QDELETED(target))
 			location = get_turf(target)
-			target.cut_overlay(image_overlay, TRUE)
+			target.cut_overlay(plastic_overlay, TRUE)
 	else
 		location = get_turf(src)
 	if(location)
@@ -111,7 +111,7 @@
 		message_admins("[ADMIN_LOOKUPFLW(user)] planted [name] on [target.name] at [ADMIN_COORDJMP(target)] with [det_time] second fuse",0,1)
 		log_game("[key_name(user)] planted [name] on [target.name] at [COORD(src)] with [det_time] second fuse")
 
-		target.add_overlay(image_overlay, 1)
+		target.add_overlay(plastic_overlay, 1)
 		if(!nadeassembly)
 			to_chat(user, "<span class='notice'>You plant the bomb. Timer counting down from [det_time].</span>")
 			addtimer(CALLBACK(src, .proc/prime), det_time*10)