Version 0.01. Released 10/25/2004
Version 0.02. Released 07/17/2006
Version 0.03. Released 07/20/2006
Version 2.00. Released 02/09/2019
(C) Copyright 2004-2006 Oleg Kobchenko. All rights reserved.
Updated 02/09/2019 David Mitchell
Portions of this program use GraphViz -- open source graph
drawing software.
(C) Copyright AT&T. http://www.graphviz.org/
Provided AS IS. No guarantees for any purpose.