Effectivness of decoys

[Hawk66]

I did a couple of changes regarding the sub/torpedo doctrines (based on current LWAMI):

• Torpedos:
  • probability that an AI sub fired torpedo uses CircleSearchPattern for a limited time after enabling or if it's lost its target / spoofed by a decoy. This is surely not a realistic behavior but it compensates a little the missing wire guidaince and against AI subs the kill rate seems to be improved
  • probability that a decoy is ignored
• AI subs
  • more variable/randomized attack logic with the possibility to fire a third weapon
  • clears the datum after the first weapon is fired (but might continue engagement)
  • in regulary, but randomized intervalls the sub 'listens' ("stealth mode") and also might do the 'Madman Ivan' manoever (uh, is this the right term for it? ) if no other platform is currently detected
  • if the sub manages to escape it might bypass the area
  • ToDo: possibility of active sonar search (limited time) if a torpedo is detected but not the launcher platform
  • ToDo: Snapshot on incoming torpedo. Might work with a special Attack doctrine command but if it works there would be the need of several doctrine files

When I'm finished and there's some interest I can upload the files.