Update turrets.dm

Changes gun turret code to be more customizable
It is now possible to specify new sprites and firing sounds, in addition to projectiles, stats, and faction

code/game/machinery/turrets.dm

@@ -402,6 +402,8 @@
 	var/scan_range = 9 //You will never see them coming
 	var/health = 200 //Because it lacks a cover, and is mostly to keep people from touching the syndie shuttle.
 	var/bullet_type = /obj/item/projectile/bullet
+	var/firing_sound = 'sound/weapons/Gunshot3.ogg'
+	var/base_icon = "syndieturret"
 	icon = 'icons/obj/turrets.dmi'
 	icon_state = "syndieturret0"
 
@@ -425,7 +427,7 @@
 /obj/machinery/gun_turret/update_icon()
 	if(state > 2 || state < 0) //someone fucked up the vars so fix them
 		take_damage(0)
-	icon_state = "syndieturret" + "[state]"
+	icon_state = "[base_icon]" + "[state]"
 	return
 
 
@@ -547,7 +549,7 @@
 		return
 	if (targloc == curloc)
 		return
-	playsound(get_turf(src), 'sound/weapons/Gunshot3.ogg', 60, 1)
+	playsound(get_turf(src), firing_sound, 60, 1)
 	var/obj/item/projectile/A = new bullet_type(curloc)
 	A.current = curloc
 	A.yo = targloc.y - curloc.y
@@ -576,4 +578,4 @@
 	name = "machine gun turret (4.6x30mm)"
 	desc = "Syndicate exterior defense turret chambered for 4.6x30mm rounds. Designed to be fitted to assault pods, it uses low calliber bullets to save space."
 	health = 100
-	bullet_type = /obj/item/projectile/bullet/weakbullet3
+	bullet_type = /obj/item/projectile/bullet/weakbullet3