Update every initialize() proc to return an initialize hint.

* Yes, all of them.
* Also did a few corrections to redundant New() and broken Destroy() along the way
* Renamed the turf_initializer.initialize() proc to InitializeTurf to avoid confusion.
* Subsumed /area/proc/initialize into /atom/proc/initialize() - Made /area's LateInitialize to get same behavior as before.

code/modules/overmap/ships/computers/engine_control.dm

@@ -9,6 +9,7 @@
 	var/obj/effect/map/ship/linked
 
 /obj/machinery/computer/engines/initialize()
+	. = ..()
 	linked = map_sectors["[z]"]
 	if (linked)
 		if (!linked.eng_control)

code/modules/overmap/ships/computers/helm.dm

@@ -11,6 +11,7 @@
 	var/dy		//coordinates
 
 /obj/machinery/computer/helm/initialize()
+	. = ..()
 	linked = map_sectors["[z]"]
 	if (linked)
 		if(!linked.nav_control)

code/modules/overmap/ships/computers/shuttle.dm

@@ -9,7 +9,7 @@
 	var/obj/effect/map/home //current destination
 
 /obj/machinery/computer/shuttle_control/explore/initialize()
-	..()
+	. = ..()
 	home = map_sectors["[z]"]
 	shuttle_tag = "[shuttle_tag]-[z]"
 	if(!shuttle_controller.shuttles[shuttle_tag])

code/modules/overmap/ships/engines/thermal.dm

@@ -54,7 +54,7 @@
 	var/datum/ship_engine/thermal/controller
 
 /obj/machinery/atmospherics/unary/engine/initialize()
-	..()
+	. = ..()
 	controller = new(src)
 
 /obj/machinery/atmospherics/unary/engine/Destroy()

code/modules/overmap/ships/ship.dm

@@ -15,6 +15,7 @@
 	var/obj/machinery/computer/engines/eng_control
 
 /obj/effect/map/ship/initialize()
+	. = ..()
 	for(var/obj/machinery/computer/engines/E in machines)
 		if (E.z == map_z)
 			eng_control = E