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/atmospherics/machinery/atmosmachinery.dm

@@ -201,17 +201,10 @@ Pipelines + Other Objects -> Pipe network
 	//Generate a unique identifier for this image combination
 	var/identifier = iconsetids[iconset] + "_[iconstate]_[direction]_[col]"
 
-	var/image/img
-	if(pipeimages[identifier] == null)
-		img = image(iconset, icon_state=iconstate, dir=direction)
-		img.color = col
-
-		pipeimages[identifier] = img
-
-	else
-		img = pipeimages[identifier]
-
-	return img
+	if((!(. = pipeimages[identifier])))
+		var/image/pipe_overlay
+		pipe_overlay = . = pipeimages[identifier] = image(iconset, iconstate, dir = direction)
+		pipe_overlay.color = col
 
 /obj/machinery/atmospherics/on_construction(pipe_type, obj_color)
 	if(can_unwrench)

code/modules/atmospherics/machinery/other/miner.dm

@@ -98,12 +98,11 @@
 /obj/machinery/atmospherics/miner/update_icon()
 	overlays.Cut()
 	if(broken)
-		var/image/A = image(icon, "broken")
-		add_overlay(A)
+		add_overlay("broken")
 	else if(active)
-		var/image/A = image(icon, "on")
-		A.color = overlay_color
-		add_overlay(A)
+		var/mutable_appearance/on_overlay = mutable_appearance(icon, "on")
+		on_overlay.color = overlay_color
+		add_overlay(on_overlay)
 
 /obj/machinery/atmospherics/miner/process()
 	update_power()