Main author: Alexander Larsson <alla@lysator.liu.se>

The following people have contributed to this program:
Fredrik Hallenberg <hallon@lystator.liu.se>
Emmanuel Briot <briot@volga.gnat.com>
Francis J. Lacoste <francis@Contre.COM>
Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
Jerome Abela <Jerome.Abela@solsoft.fr>
