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/effects/decals/Cleanable/fuel.dm

@@ -25,7 +25,7 @@
 		if(!has_spread)
 			Spread()
 		else
-			del(src)
+			qdel(src)
 
 	proc/Spread(exclude=list())
 		//Allows liquid fuels to sometimes flow into other tiles.

code/game/objects/effects/decals/Cleanable/humans.dm

@@ -21,7 +21,7 @@ var/global/list/image/splatter_cache=list()
 	var/list/datum/disease2/disease/virus2 = list()
 	var/amount = 5
 
-/obj/effect/decal/cleanable/blood/Del()
+/obj/effect/decal/cleanable/blood/Destroy()
 	for(var/datum/disease/D in viruses)
 		D.cure(0)
 	..()
@@ -37,7 +37,7 @@ var/global/list/image/splatter_cache=list()
 				if(B != src)
 					if (B.blood_DNA)
 						blood_DNA |= B.blood_DNA.Copy()
-					del(B)
+					qdel(B)
 	spawn(DRYING_TIME * (amount+1))
 		dry()
 
@@ -198,7 +198,7 @@ var/global/list/image/splatter_cache=list()
                 for (var/i = 0, i < pick(1, 200; 2, 150; 3, 50; 4), i++)
                         sleep(3)
                         if (i > 0)
-                                var/obj/effect/decal/cleanable/blood/b = new /obj/effect/decal/cleanable/blood/splatter(src.loc)
+                                var/obj/effect/decal/cleanable/blood/b = PoolOrNew(/obj/effect/decal/cleanable/blood/splatter, src.loc)
                                 b.basecolor = src.basecolor
                                 b.update_icon()
                                 for(var/datum/disease/D in src.viruses)

code/game/objects/effects/decals/Cleanable/misc.dm

@@ -21,14 +21,14 @@
 	var/turf/simulated/floor/F = get_turf(src)
 	if (istype(F))
 		F.dirt += 4
-	del(src)
+	qdel(src)
 
 /obj/effect/decal/cleanable/greenglow
 
 	New()
 		..()
 		spawn(1200)// 2 minutes
-			del(src)
+			qdel(src)
 
 /obj/effect/decal/cleanable/dirt
 	name = "dirt"
@@ -102,7 +102,7 @@
 	random_icon_states = list("vomit_1", "vomit_2", "vomit_3", "vomit_4")
 	var/list/viruses = list()
 
-	Del()
+	Destroy()
 		for(var/datum/disease/D in viruses)
 			D.cure(0)
 		..()