bug fix

src/Muzich/CoreBundle/ElementFactory/Site/JamendocomFactory.php

   {
     $url_object = $this->getCleanedUrl();
     $get_url = null;
+    $url = null;
     
     // http://www.jamendo.com/fr/album/30661
     if (preg_match("#^\/[a-zA-Z0-9_-]+\/album\/([0-9]+)#", $url_object, $chaines))

src/Muzich/CoreBundle/Entity/Group.php

     $GroupsTagsFavorites->setTag($tag);
     $GroupsTagsFavorites->setPosition(0);
     $GroupsTagsFavorites->setGroup($this);
+    $em->persist($this);
     $em->persist($GroupsTagsFavorites);
+    $em->persist($tag);
     $this->tags[] = $GroupsTagsFavorites;
   }