I would like to thank:
Ron Boisvert and Roldan Pozo for many helpful suggestions.
Eite Tiesinga, Karin Remington, Roldan Pozo, Walt Brainard, Neil
Campbell, Neil Carlson, Jeroen Groenenboom, Alan Hoffman, Steve Lionel,
Christian de Polignac, Mitsu Sakamoto, David Vallance,
and Mike Vermeulen for beta testing or otherwise providing assistance.