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Copyright © 2003 - 2006 Gareth Anderson. 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 can be found in the section called the GNU Free Documentation License or at the GNU Documentation License Site.