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/mob/living/bot/bot.dm

@@ -51,7 +51,7 @@
 
 // Make sure mapped in units start turned on.
 /mob/living/bot/initialize()
-	..()
+	. = ..()
 	if(on)
 		turn_on() // Update lights and other stuff