License of this document (c) Copyright 2003 Olivier Berger - under GFDL license

• The present document is Copyright (c) 2003 Olivier Berger.

• Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is available at : http://www.gnu.org/copyleft/fdl.html