Updates the atom_pool, now datum_pool, to handle any datum object.

Makes the garbage collector similarly robust. Continues the whole Destroy/qdel porting.

code/game/objects/structures/crates_lockers/crates.dm

@@ -105,18 +105,18 @@
 	switch(severity)
 		if(1.0)
 			for(var/obj/O in src.contents)
-				del(O)
-			del(src)
+				qdel(O)
+			qdel(src)
 			return
 		if(2.0)
 			for(var/obj/O in src.contents)
 				if(prob(50))
-					del(O)
-			del(src)
+					qdel(O)
+			qdel(src)
 			return
 		if(3.0)
 			if (prob(50))
-				del(src)
+				qdel(src)
 			return
 		else
 	return