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/lore_codex/codex.dm

@@ -9,7 +9,7 @@
 
 /obj/item/weapon/book/codex/initialize()
 	tree = new(src, root_type)
-	..()
+	. = ..()
 
 /obj/item/weapon/book/codex/attack_self(mob/user)
 	if(!tree)