game: send socket messages on separate thread, not ui thread
game: increased default zoom, for some reason
view: only redraw if model changed

especially reduces number of redraws when moving stones
reduced the FPS for animations to 25
removed unused ViewInterface interface
view/game: retain scale on rotate, restore from preferences on create
board: more intense colors for board and stones
view: improved stone roll effect when placing stones
view: draw all stones with alpha 0.75
version 0.0.1