Rewrite index.php: support ADExpert v6 and bootstrap

It's maybe possible to have a look to the RSS feed but we need the ressources
But we can also use an hidden address... /jsp/custom/modules/plannings/direct_planning.jsp?keepSelection (...)
But it can be nice to have the UUID to avoid duplications
Other possibility: http://ucl2icsphp.appspot.com/ade.php