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/game/objects/effects/misc.dm

@@ -34,6 +34,7 @@
 	pixel_y = -32
 
 /obj/effect/temporary_effect/cleave_attack/initialize() // Makes the slash fade smoothly. When completely transparent it should qdel itself.
+	. = ..()
 	animate(src, alpha = 0, time = time_to_die - 1)
 
 /obj/effect/temporary_effect/shuttle_landing
@@ -44,4 +45,4 @@
 
 /obj/effect/temporary_effect/shuttle_landing/initialize()
 	flick("shuttle_warning", src) // flick() forces the animation to always begin at the start.
-	..()
+	. = ..()