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/tables/tables.dm

@@ -60,7 +60,7 @@ var/list/table_icon_cache = list()
 	take_damage(100)
 
 /obj/structure/table/initialize()
-	..()
+	. = ..()
 
 	// One table per turf.
 	for(var/obj/structure/table/T in loc)