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/ATMOSPHERICS/components/binary_devices/dp_vent_pump.dm

@@ -194,7 +194,7 @@
 	return 1
 
 /obj/machinery/atmospherics/binary/dp_vent_pump/initialize()
-	..()
+	. = ..()
 	if(frequency)
 		set_frequency(frequency)
 

code/ATMOSPHERICS/components/binary_devices/passive_gate.dm

@@ -128,7 +128,7 @@
 	return 1
 
 /obj/machinery/atmospherics/binary/passive_gate/initialize()
-	..()
+	. = ..()
 	if(frequency)
 		set_frequency(frequency)
 

code/ATMOSPHERICS/components/binary_devices/pump.dm

@@ -148,7 +148,7 @@ Thus, the two variables affect pump operation are set in New():
 		ui.set_auto_update(1)		// auto update every Master Controller tick
 
 /obj/machinery/atmospherics/binary/pump/initialize()
-	..()
+	. = ..()
 	if(frequency)
 		set_frequency(frequency)