Shells and Periphery (#1327)

Adds Shells. Adds tags. Adds IPC subspecies. Adds HK-47's. Does not add IPC construction.

Beyond the obvious review of shells, the exact stats of the IPC subspecies need review. They were largely an afterthought, and quickly overshadowed by the shell project.

code/game/objects/items/weapons/material/shards.dm

@@ -59,10 +59,10 @@
 	..()
 	if(isliving(AM))
 		var/mob/M = AM
-		
+
 		if(M.buckled) //wheelchairs, office chairs, rollerbeds
 			return
-		
+
 		M << "<span class='danger'>You step on \the [src]!</span>"
 		playsound(src.loc, 'sound/effects/glass_step.ogg', 50, 1) // not sure how to handle metal shards with sounds
 		if(ishuman(M))
@@ -73,7 +73,7 @@
 
 			if( H.shoes || ( H.wear_suit && (H.wear_suit.body_parts_covered & FEET) ) )
 				return
-			
+
 			var/list/check = list("l_foot", "r_foot")
 			while(check.len)
 				var/picked = pick(check)
@@ -94,5 +94,8 @@
 /obj/item/weapon/material/shard/shrapnel/New(loc)
 	..(loc, "steel")
 
+/obj/item/weapon/material/shard/shrapnel/flechette/New(loc)
+	..(loc, "titanium")
+
 /obj/item/weapon/material/shard/phoron/New(loc)
 	..(loc, "phglass")