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/power/cells/device_cells.dm

@@ -21,7 +21,7 @@
 	charge_amount = 20
 
 /obj/item/weapon/cell/device/weapon/empty/initialize()
-	..()
+	. = ..()
 	charge = 0
 	update_icon()