[FT] Multiple Turn Weapons

I toyed with this a while back. With ship-borne weapons there's a 
problem tracking changing arcs (assuming the weapon is limited arc) and 
ranges from turn to turn to keep "lock". Another problem with the 
"standard" FT timescale where a turn is 15-20 minutes is a matter of 
feel rather than mechanics. Torpedo/missile type weapons with long 
duration effects don't have this problem and leech pods are already part

of the game. They could possibly be generalized to non-organic ships, 
but then the SV should probably have them somewhat strengthened.