2008-03-16 Jens Alfke Game class now tracks board state and moves, as strings, and can step through its history.
2008-03-12 Jens Alfke Fixed: An exception in the Go game if you mouse down on the board but then drag to the captured-pieces area and release the mouse.
2008-03-12 Jens Alfke Fixed the conversion of window to layer coordinates. The old way didn't work in HiDPI. Thanks to Quincey Morriss and Nathan Vander Wilt for figuring this out.