I would like to thank:
Ron Boisvert, Roldan Pozo, and Eite Tiesinga for many helpful suggestions.
Karin Remington,
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.