-tg- atom pooling system, qdel changes

This commit first and foremost ports the -tg- atom pooling system, and
removes the old experimental system entirely.

Secondly, this PR modifies the qdel system to use a -tg- lookalike
"destroy hint" system, which means that individual objects can tell qdel
what to do with them beyond taking care of things they need to delete.
This ties into the atom pooling system via a new hint define,
QDEL_HINT_PUTINPOOL, which will place the atom in the pool instead of
deleting it as per standard.

Emitter beams are now fully pooled.

Qdel now has semi-compatibility with all datum types, however it is not
the same as -tg-'s "Queue everything!" system. It simply passes it through
the GC immediately and adds it to the "hard del" lists. This means that
reagents can be qdel'ed, but there is no purpose as of yet, as it is more
or less the same as just deleting them, with the added effect of adding
logs of them being deleted to the garbage collector.

code/game/objects/items/devices/PDA/PDA.dm

@@ -1300,7 +1300,7 @@ var/global/list/obj/item/device/pda/PDAs = list()
 
 		explosion(T, -1, -1, 2, 3)
 	JFLOG("Exploded")
-	del(src)
+	qdel(src)
 	return
 
 /obj/item/device/pda/Destroy()
@@ -1310,7 +1310,7 @@ var/global/list/obj/item/device/pda/PDAs = list()
 		src.id.loc = get_turf(src.loc)
 	if(src.pai)
 		src.pai.loc = get_turf(src.loc)
-	..()
+	return ..()
 
 /obj/item/device/pda/clown/Crossed(AM as mob|obj) //Clown PDA is slippery.
 	if (istype(AM, /mob/living/carbon))

code/game/objects/items/devices/PDA/radio.dm

@@ -26,7 +26,7 @@
 /obj/item/radio/integrated/Destroy()
 	if(radio_controller)
 		radio_controller.remove_object(src, control_freq)
-	..()
+	return ..()
 
 /obj/item/radio/integrated/proc/post_signal(var/freq, var/key, var/value, var/key2, var/value2, var/key3, var/value3,var/key4, var/value4, s_filter)
 
@@ -48,7 +48,7 @@
 		signal.data[key4] = value4
 
 	frequency.post_signal(src, signal, filter = s_filter)
-	
+
 	return
 
 /obj/item/radio/integrated/receive_signal(datum/signal/signal)
@@ -139,7 +139,7 @@
 /obj/item/radio/integrated/mule/Destroy()
 	if(radio_controller)
 		radio_controller.remove_object(src,beacon_freq)
-	..()
+	return ..()
 
 // receive radio signals
 // can detect bot status signals
@@ -237,7 +237,7 @@
 /obj/item/radio/integrated/signal/Destroy()
 	if(radio_controller)
 		radio_controller.remove_object(src, frequency)
-	..()
+	return ..()
 
 /obj/item/radio/integrated/signal/initialize()
 	if (src.frequency < 1441 || src.frequency > 1489)

code/game/objects/items/devices/flashlight.dm

@@ -234,19 +234,19 @@ obj/item/device/flashlight/lamp/bananalamp
 
 
 /obj/item/device/flashlight/emp/New()
-		..()
-		processing_objects.Add(src)
+	..()
+	processing_objects.Add(src)
 
 /obj/item/device/flashlight/emp/Destroy()
-		processing_objects.Remove(src)
-		..()
+	processing_objects.Remove(src)
+	return ..()
 
 /obj/item/device/flashlight/emp/process()
-		charge_tick++
-		if(charge_tick < 10) return 0
-		charge_tick = 0
-		emp_cur_charges = min(emp_cur_charges+1, emp_max_charges)
-		return 1
+	charge_tick++
+	if(charge_tick < 10) return 0
+	charge_tick = 0
+	emp_cur_charges = min(emp_cur_charges+1, emp_max_charges)
+	return 1
 
 /obj/item/device/flashlight/emp/attack(mob/living/M as mob, mob/living/user as mob)
 	if(on && user.zone_sel.selecting == "eyes") // call original attack proc only if aiming at the eyes

code/game/objects/items/devices/guitar.dm

@@ -18,7 +18,7 @@
 /obj/item/device/guitar/Destroy()
 	del(song)
 	song = null
-	..()
+	return ..()
 
 /obj/item/device/guitar/attack_self(mob/user as mob)
 	interact(user)

code/game/objects/items/devices/paicard.dm

@@ -18,7 +18,7 @@
 	//Will stop people throwing friend pAIs into the singularity so they can respawn
 	if(!isnull(pai))
 		pai.death(0)
-	..()
+	return ..()
 
 /obj/item/device/paicard/attack_self(mob/user)
 	if (!in_range(src, user))

code/game/objects/items/devices/radio/electropack.dm

@@ -25,6 +25,7 @@
 		else if(S.part2 == src)
 			S.part2 = null
 		master = null
+	return ..()
 
 /obj/item/device/radio/electropack/attackby(obj/item/weapon/W as obj, mob/user as mob, params)
 	..()

code/game/objects/items/devices/radio/intercom.dm

@@ -32,7 +32,7 @@
 
 /obj/item/device/radio/intercom/Destroy()
 	processing_objects.Remove(src)
-	..()
+	return ..()
 
 /obj/item/device/radio/intercom/attack_ai(mob/user as mob)
 	add_hiddenprint(user)

code/game/objects/items/devices/scanners.dm

@@ -37,7 +37,7 @@ REAGENT SCANNER
 /obj/item/device/t_scanner/Destroy()
 	if(on)
 		processing_objects.Remove(src)
-	..()
+	return ..()
 
 /obj/item/device/t_scanner/attack_self(mob/user)
 

code/game/objects/items/devices/violin.dm

@@ -17,7 +17,7 @@
 /obj/item/device/violin/Destroy()
 	del(song)
 	song = null
-	..()
+	return ..()
 
 /obj/item/device/violin/attack_self(mob/user as mob)
 	interact(user)