Updates misc atmospherics machinery init and destroy.

Fixes Destroy() proc on zpipes and cryo cells gets rid of a `loc = X`
Updates remaining atmos machinery to use atmos_init
Fixes area atmos computer to use initialize() instead of spawn-in-New

code/modules/multiz/pipes.dm

@@ -26,8 +26,11 @@ obj/machinery/atmospherics/pipe/zpipe
 
 		level = 1
 
-obj/machinery/atmospherics/pipe/zpipe/New()
+/obj/machinery/atmospherics/pipe/zpipe/New()
 	..()
+	init_dir()
+
+/obj/machinery/atmospherics/pipe/zpipe/init_dir()
 	switch(dir)
 		if(SOUTH)
 			initialize_directions = SOUTH
@@ -91,7 +94,7 @@ obj/machinery/atmospherics/pipe/zpipe/Destroy()
 		node1.disconnect(src)
 	if(node2)
 		node2.disconnect(src)
-	..()
+	. = ..()
 
 obj/machinery/atmospherics/pipe/zpipe/pipeline_expansion()
 	return list(node1, node2)
@@ -122,7 +125,7 @@ obj/machinery/atmospherics/pipe/zpipe/up
 		name = "upwards pipe"
 		desc = "A pipe segment to connect upwards."
 
-obj/machinery/atmospherics/pipe/zpipe/up/initialize()
+obj/machinery/atmospherics/pipe/zpipe/up/atmos_init()
 	normalize_dir()
 	var/node1_dir
 
@@ -160,7 +163,7 @@ obj/machinery/atmospherics/pipe/zpipe/down
 		name = "downwards pipe"
 		desc = "A pipe segment to connect downwards."
 
-obj/machinery/atmospherics/pipe/zpipe/down/initialize()
+obj/machinery/atmospherics/pipe/zpipe/down/atmos_init()
 	normalize_dir()
 	var/node1_dir