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.
Good to see folks enjoying their description-writing.  (String generation is one of the more rewarding aspects of DDA dev.)  Watch that period at the end and let loose the juice.

*KA101 was kinda fond of the napalm tanks in Generals/Zero Hour, but preferred the GLA and Quads*