Engine change: friendlyfire is now selffire, and friendlyfire defines if your *allies* are hit
Tactical AI using NPCs will be less likely to keep hiding in corridors, they'll get into LOS to try to pound you (but then you can thus pound them too)
Tactical AI now has parameters to avoid friendly fire


git-svn-id: http://svn.net-core.org/repos/t-engine4@2801 51575b47-30f0-44d4-a5cc-537603b46e54