Added mwlib services

Simple local usage:

    mwlib = {
      nserve = {
        enable = true;
      };

      qserve = {
        enable = true;
      };
    };

For MediaWiki:

      $wgCollectionMWServeURL = 'http://localhost:8899';
      $wgCollectionFormats = array(
        'rl' => 'PDF',
        'odf' => 'ODT',
      );

      $wgCollectionPortletFormats = array (
        'odf', 'rl'
      );