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/recycling/disposal-unit.dm

@@ -364,7 +364,7 @@
 
 	//flush handle
 	if(flush)
-		add_overlay(image('icons/obj/atmospherics/pipes/disposal.dmi', "dispover-handle"))
+		add_overlay("dispover-handle")
 
 	//only handle is shown if no power
 	if(stat & NOPOWER || panel_open)
@@ -372,13 +372,13 @@
 
 	//check for items in disposal - occupied light
 	if(contents.len > 0)
-		add_overlay(image('icons/obj/atmospherics/pipes/disposal.dmi', "dispover-full"))
+		add_overlay("dispover-full")
 
 	//charging and ready light
 	if(pressure_charging)
-		add_overlay(image('icons/obj/atmospherics/pipes/disposal.dmi', "dispover-charge"))
+		add_overlay("dispover-charge")
 	else if(full_pressure)
-		add_overlay(image('icons/obj/atmospherics/pipes/disposal.dmi', "dispover-ready"))
+		add_overlay("dispover-ready")
 
 //timed process
 //charge the gas reservoir and perform flush if ready