Damage Groups (Singleplayer) + bug fix

Copied damage grouping from multiplayer over to single player so you can
try it out on the bots. Also made it so the bots also have damage
grouping (but their values are different and are determined near the
bottom of TraceAttack function in Sword.uc)

Fixed issue where currentStance wasn't declared on startup. Now you
won't have sword merging on first swap w/ swords

Changed network frequency from 400 to 200