* config.h.mingw:
	* src/boards/Makefile.mingw:
	* src/boards/algebra.c: fixed board title
	* src/boards/chess.c: (chess_create_item), (move_piece_to): fixed to work with
	sub level operating systems inable to differentiate a 'A' from a 'a'. This was
	creating a bug by having gcompris play black against black only.
	* src/gcompris/board.c: (init_plugins), (board_check_file): added chess.
	fixed it to let boards load on windows. It works on windows again.