Ugly fix for still not found freeze bug in BattleUpdater.
Added maximum-distance for monsters initiating battle when targeting a
player or entity in battle.
Updated config version to 6.
Changed turn-based-battle start behavior to also start when a hostile
mob targets a player or entity in battle.
Added config option to revert to old-style battle starting behavior.
(Since config version updated, older config will be moved and the new
config will take its place.)
Changed mob attack target in Battle to whatever they were targeting (via
a call to "getAttackTarget()").
Fix bug where bow attack hit announcement was made multiple times.
Fix config format for Entities.
Add feature to freeze combatants when battle starts, option to enable in
config.
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.
