* [shogi-server]

* [shogi-server]
  - Added a new pairing method, ShogiServer::ExcludeUnratedPlayers,
    which filters out unrated players.
  - Enhanced syntax of Floodgate time configuration file.
    Now it supports "set pairing_factory <function_name>"; it sets a
    factory function name generating a pairing method which will be
    used in a specific Floodgate game.
    ex. set pairing_factory floodgate_zyunisen