Things to fix:
  - multi-line statusbar messages text get cuts off in the toolbar on maemo,
    instead of being two lines (and we might need to make the text smaller)
  - consider setting board.c:MAX_DELTA to 0.25 which looks nicer
  - remove delayed call timeouts on game-clear and finalize
  - check why some calls in cscmi.c are protected by the exception catcher,
    while others are not
  - now that we put CallData on the stack, we shouldn't need to explicitly
    gc_protect our objects in game.c

Ideas:
  - reimplement game timeout handling (no rule sets require them atm)
  - portrait mode
  - implement a11y

Game features:

Implement the dealable feature. See bug #445955.

[This is now an empty section. It will occasionally be used to track which
games have, or have not, been adapted for particular features. The
droppable feature was the last such example (see bug #305609).]
