- options menu including background image selection (fractals!)
- provide images combined with theme settings (i.e. bright/dark fonts)
- make fullscreen the default?
- when going back to intro screen, keep game running
  and display minimised screenshot of it
  (and ask before starting new, or quitting)
- document game.figuregfx(), and other possible changes
- fix Reversi rules, Hnefatafl AI
- sounds!
- deprecate -ggz in favour of GGZMODE
- more flexible installation of python modules (site-python is deprecated)
- Shogi server

