BattleArena

Permission improvements

• The standard command permission is now granted by default (battlearena.command.<command>)
• User is informed they do not have permission when attempting to execute a subcommand
• If a server admin wishes to fully hide or disable the base command, simply setting the permission value to false for the base permission will now hide it from tab complete, rather than this being the default behavior
• Wildcards are now supported (i.e. battlearena.command.arena.*)