New bullet types, projectile rewrite

* Refactors projectile Bump()
* Converts projectile_type var strings to paths
* Reorganizes bullet projectile paths
* Made a pass through all the bullet_act() definitions. Mainly ensured that damage_type is checked when dealing damage to certain objects. Removed stupid /turf bullet_act() override, replaced with on_hit() overrides on the relevant projectiles.

* Adds shotgun pellets projectile. Adds Raptor's shotgun slug sprite.
* Gives stunshots more of their own identity, refluffs them as taser cartridges for shotguns. They still aren't obtainable anywhere unless spawned.
* Makes projectiles pass through girders and cultgirders with a certain probability, unless the girder itself was clicked.
* Projectiles are also able to pass through grilles. Low damage projectiles have a chance to be blocked by grilles. High damage projectiles have a chance to have some damage absorbed by the grille.
* Makes projectiles for blanks invisible.
* Adds flash bullet types
* Adds support for 'penetrating' projectiles
* Swaps .45 and 9mm projectile types. .45s hit slightly harder, 9mils have more ammo capacity.

code/game/objects/items/weapons/grenades/flashbang.dm

@@ -21,11 +21,11 @@
 			B.health -= damage
 			B.update_icon()
 
-		new/obj/effect/effect/smoke/flashbang(src.loc)
+		new/obj/effect/effect/smoke/illumination(src.loc, brightness=15)
 		del(src)
 		return
 
-	proc/bang(var/turf/T , var/mob/living/carbon/M)						// Added a new proc called 'bang' that takes a location and a person to be banged.
+	proc/bang(var/turf/T , var/mob/living/carbon/M)					// Added a new proc called 'bang' that takes a location and a person to be banged.
 		if (locate(/obj/item/weapon/cloaking_device, M))			// Called during the loop that bangs people in lockers/containers and when banging
 			for(var/obj/item/weapon/cloaking_device/S in M)			// people in normal view.  Could theroetically be called during other explosions.
 				S.active = 0										// -- Polymorph
@@ -100,16 +100,6 @@
 				M << "\red Your ears start to ring!"
 		M.update_icons()
 
-/obj/effect/effect/smoke/flashbang
-	name = "illumination"
-	time_to_live = 10
-	opacity = 0
-	icon_state = "sparks"
-
-/obj/effect/effect/smoke/flashbang/New()
-	..()
-	SetLuminosity(15)
-
 /obj/item/weapon/grenade/flashbang/clusterbang//Created by Polymorph, fixed by Sieve
 	desc = "Use of this weapon may constiute a war crime in your area, consult your local captain."
 	name = "clusterbang"