Add Blaze's Turret mod

per http://smf.cataclysmdda.com/index.php?topic=8060.msg190017#msg190017

This is the Vehicle Turret Mod, by Blaze. I have not done any work on this other than submitting it here, so all credit goes to Blaze.
This makes a rebar from 200 metal shards, as I read it.  "From" rather than "Into"?