pgn parser can now handle comments (although it ignores them for now) default tip

adds unicode support

error message when syntactically validating a King's move into a check position is now correct

verified that checkmate notation does work correctly

fixes ambiguity resolver in PGN output not resolving ambiguities for diagonally attacking Knights

PGN output now correctly breaks after black has also moved

fixes castling not printed correctly to PGN

move log has now three columns and starts scrolling after 45 moves

fixes move validation working on old king's position, when the king moves

fixes wrong macro expansion for is_attacked()

(0) -10 tip