Fixed crash with AutoTeams 'manual' / 'none'
Add autobalance to readme and update contributors.
Cached DiskGetFileInfo to reduce disk i/o, can cause stutter for players
with heavy platter disk load
Removed trailing spaces

Conflicts:
	lua/aibrain.lua
Score accumulation on sim side now uses 1 thread instead of 3
Cleanup
Pause music when volume is 0

Music was played in background even when volume was 0, this resulted in
30kb / s constant diskreads which can cause stutter if a platter-disk is already
under heavy load (torrents etc)
Music fix
Optimized build range ring on selection of ENGINEER units
Optimized filtering of factories in rallypoint beat function