Game server: player damage calcs now allow for the larger temp values (i.e. when calculating bonuses), so it should no longer overflow into a positive number (and give HP instead). Fixes #254.
AI server: restored the server start time message (was going to just remove it completely, but...)
AI server: cleaned up the user info parsing code, as they're all the same packet (they just expect slightly different use cases).
AI server: user array/map is no longer preinitialised to 0.
AI server: now makes use of byMagicAttack. Also removed a bunch of unused methods.