Adds decorative bones and bone loot pile (#4800)

* adds various bones and bone loot pile

credit to schnayy for most of these sprites

* removes the crossbow bolt from the loot list

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

@@ -0,0 +1,46 @@
+//These bone objects are mostly for mapping and decoration. They have no actual medical use, so maybe don't try to put them in anybody.
+/obj/item/weapon/bone
+	name = "bone"
+	desc = "A non-descript bone. It's so old and worn you can barely tell which part of the body it's from."
+	icon = 'icons/obj/bones.dmi'
+	icon_state = "bone"
+	force = 5
+	throwforce = 6
+	item_state = "bone"
+	w_class = ITEMSIZE_SMALL
+	attack_verb = list("attacked", "bashed", "battered", "bludgeoned", "whacked", "bonked", "boned")
+
+/obj/item/weapon/bone/skull
+	name = "skull"
+	desc = "A skull. Judging by the shape and size, you'd guess that it might be human."
+	icon_state = "skull"
+	throwforce = 7
+
+/obj/item/weapon/bone/skull/tajaran
+	desc = "A skull. Judging by the shape and size, you'd guess that it might be tajaran."
+	icon_state = "tajskull"
+
+/obj/item/weapon/bone/skull/unathi
+	desc = "A skull. Judging by the shape and size, you'd guess that it might be unathi."
+	icon_state = "unaskull"
+
+/obj/item/weapon/bone/skull/unknown
+	desc = "A skull. You're not sure what species it might be, though."
+	icon_state = "xenoskull"
+
+/obj/item/weapon/bone/arm
+	name = "arm bone"
+	desc = "Wielding this, you're armed and dangerous, no bones about it."
+	attack_verb = list("attacked", "bashed", "battered", "bludgeoned", "whacked", "bonked", "boned", "slapped", "punched")
+	icon_state = "arm"
+
+/obj/item/weapon/bone/leg
+	name = "leg bone"
+	desc = "Don't worry about getting into an argument with the owner of this. They don't have a leg to stand on."
+	attack_verb = list("attacked", "bashed", "battered", "bludgeoned", "whacked", "bonked", "boned", "kicked")
+	icon_state = "leg"
+
+/obj/item/weapon/bone/ribs
+	name = "ribcage"
+	desc = "If you had some mallets, you could probably use this as a makeshift xylophone."
+	icon_state = "ribs"