Credits
  -------

  I have to thank the following people :

  - Andreas Harrenberg for testing and debugging at the meeting in Ulm
  - Bernhard Möllemann for writing the a2hex-routine and testing.
  - Kai Hofmann for bugfixing

  and my beta testers :

  - Michael van Elst
  - Bernd Ernesti
  - Michael Bauer
  - Bernhard Scholz

  That's enough for such a little program ;-)