Separates the sharp flag into edge and sharp

Now weapons can properly cause cuts without necessarily having a greater
chance to remove limbs.

Also separates is_sharp, has_edge, and can_puncture.

code/modules/projectiles/gun.dm

@@ -201,7 +201,7 @@
 
 			in_chamber.on_hit(M)
 			if (in_chamber.damage_type != HALLOSS)
-				user.apply_damage(in_chamber.damage*2.5, in_chamber.damage_type, "head", used_weapon = "Point blank shot in the mouth with \a [in_chamber]")
+				user.apply_damage(in_chamber.damage*2.5, in_chamber.damage_type, "head", used_weapon = "Point blank shot in the mouth with \a [in_chamber]", sharp=1)
 				user.death()
 			else
 				user << "<span class = 'notice'>Ow...</span>"

code/modules/projectiles/guns/alien.dm

@@ -5,6 +5,7 @@
 	name = "alloy spike"
 	desc = "It's about a foot of weird silver metal with a wicked point."
 	sharp = 1
+	edge = 0
 	throwforce = 5
 	w_class = 2
 	icon = 'icons/obj/weapons.dmi'

code/modules/projectiles/guns/projectile/bow.dm

@@ -9,6 +9,7 @@
 	throwforce = 8
 	w_class = 3.0
 	sharp = 1
+	edge = 0
 
 /obj/item/weapon/arrow/proc/removed() //Helper for metal rods falling apart.
 	return

code/modules/projectiles/guns/projectile/revolver.dm

@@ -183,7 +183,7 @@
 				playsound(user, fire_sound, 50, 1)
 				user.visible_message("<span class='danger'>[user.name] fires [src] at \his head!</span>", "<span class='danger'>You fire [src] at your head!</span>", "You hear a [istype(in_chamber, /obj/item/projectile/beam) ? "laser blast" : "gunshot"]!")
 				if(!P.nodamage)
-					user.apply_damage(300, BRUTE, affecting) // You are dead, dead, dead.
+					user.apply_damage(300, BRUTE, affecting, sharp=1) // You are dead, dead, dead.
 				return
 	..()