This documentation has been written and is copyrighted 1997 by Markus Gutschke <gutschk AT math PERIOD uni-muenster PERIOD de>. You are free to distribute this file as long as you do not change its contents. I appreciate comments and will consider them in future revisions. If you have any questions, comments, or suggestions, please also send carbon copies of your e-mail message to both Ken Yap <kenUNDERSCOREyap AT users PERIOD sourceforge PERIOD net> and Gero Kuhlmann <gero AT gkminix PERIOD han PERIOD de>. I will happily include any of your extensions, but I would like to avoid the proliferation of different incompatible revisions of this document. If these conditions are a problem to you, then feel free to contact me.