scoreDirectionsLoop fix

Bug in scoreDirectionsLoop corrected (hiScore passed by reference now)
printPieces - modified to display piece positions more efficiently
Debug output controlled more finely by two new settings:
__DEBUG_DECISIONS__ for output on move analysis and __DEBUGSTATE__ for
output on game state (e.g. board or positions data)
Drag and drop made slightly to snap to position from within 20 pixels
instead of 15
Save game message added