Copyright 2010 Kevin Ryde This file is part of Math-Aronson. Math-Aronson is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. Math-Aronson is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You can get a copy of the GNU General Public License online at . Version 4, October 2010 - new lying option - allow lang=>undef as default English Version 3, September 2010 - test manifest only as an author test Version 2, September 2010 - letter option affect default initial_string Version 1, August 2010 - the first version