-added fixed piece move animation length
-added speed vs. length setting
-changed default speed to 20
code cosmetics
moved color configuration for board theme into BoardTheme class
added frame for board squares
dragged piece is removed from board
added new shatra pieces and povray script to render them
changes originalshatra pieces
Merge branch 'dev' of https://github.com/franzm/shatrabase
fixed off-view bug in BoardPainter