Mod should also now resume other previously playing sounds/music after
battle has ended.
Also prevents possible concurrent modification exception when new
Entities are added to Battle server-side.
Battle music volume is set based on the music volume slider in the
Minecraft settings. The default Midi device provided in Java does not
appear to support changing the volume of playing midi file after some
testing. For now, only ".wav" files obey the Music volume slider
settings.
BattleGui now displays health of all combatants.
Players can leave battle by entering creative mode (set by server).
Added battle size limit (default 8) can be set in config.
