Changed about

Removed about.xml, added about.html

about.html

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+<h1>Authors</h1>
+<h2>COPS is developped and maintained by Sébastien Lucas.</h2>
+
+<p>See full history on <a href="https://github.com/seblucas">Github</a> to check all authors.<br />
+COPS use some external librairies, check README for the details.</p>
+
+<h2>Copyright</h2>
+<p>This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.<br />
+The complete content of license is provided in file COPYING within distribution and also available <a href="http://www.gnu.org/licenses/gpl-2.0.html">online</a>.</p>
+
+<h2>Contact</h2>
+<p>For more info please visit <a href="http://blog.slucas.fr/en/oss/calibre-opds-php-server">COPS Home Page</a></p>
+<p>You can also check <a href="http://www.mobileread.com/forums/showthread.php?t=170903">COPS's topic on MobileRead forum</a>.</p>