message: Fix header that was not pointing on the correct web site. Cpp documentation header was not good
diff: <!--BEGIN PROJECT_NAME--><title>$projectname: $title</title><!--END PROJECT_NAME-->
  <!--BEGIN !PROJECT_NAME--><title>$title</title><!--END !PROJECT_NAME-->
  <!-- GUDHI website css for header BEGIN -->
  -<link rel="stylesheet" type="text/css" href="http://pages.saclay.inria.fr/vincent.rouvreau/gudhi/gudhi-doc-2.0.0/assets/css/styles_feeling_responsive.css" />
  +<link rel="stylesheet" type="text/css" href="http://gudhi.gforge.inria.fr/assets/css/styles_feeling_responsive.css" />
  <!-- GUDHI website css for header END -->
  <link href="$relpath^tabs.css" rel="stylesheet" type="text/css"/>
  <script type="text/javascript" src="$relpath^jquery.js"></script>
  