Harpoon, harpoon sprites, removed pneumatic cannon sprites from human.dmi.

code/game/objects/items/weapons/weaponry.dm

@@ -136,4 +136,14 @@
 
 /obj/item/weapon/katana/attack(mob/living/carbon/M as mob, mob/living/carbon/user as mob)
 	playsound(loc, 'sound/weapons/bladeslice.ogg', 50, 1, -1)
-	return ..()
+	return ..()
+
+/obj/item/weapon/harpoon
+	name = "harpoon"
+	desc = "Tharr she blows!"
+	icon_state = "harpoon"
+	item_state = "harpoon"
+	force = 20
+	throwforce = 15
+	w_class = 2
+	attack_verb = list("jab","stabbed","ripped")