Probably breaks curses build, but for gtk and Android
turn move and trade confirmation into a two-step process, making
board_commitTurn() non-interactive when called with a second
parameter. The old blocking util methods now return void and it's up to
the client code to interact (on the main thread) then re-call
board_commitTurn() if appropriate.
First attempt to stop blocking the jni thread: instead of returning a
password from a util_ method, have it include enough state that the UI
can return, put up a dialog, and then pass that state and the password
back and have them matched up again. I think this will work for the
remaining blocking Alerts too.
Done in a way that won't work for Android just to try out the gtk
way. Tweaks and reuses the existing draw context and board, which is
precisely what the android version can't easily do.
Board renders, but only when touched. Tray and scoreboard skipped for
now. Lots of changed still to go, and some asserts added where I didn't
want to stop to solve a compile problem.
