Merged non-admin commands into /duels <subcommand>. Use /duel <player> to duel someone.
Added help command for /duels. Provides better list of commands than before.
Fixed some queue problems.
Added %duel_queue_amount% placeholder.
Added %duel_bet_amount% placeholder.
Better tab-completing. Your name will no longer show in tab completer. (for example /duel <player>)