/**
  * fill some properties from informations stored into the project.xml or jelix-app.json file.
  * @return string the application name
  */
 function loadFromProject()
 {
     $infos = new \Jelix\Core\Infos\AppInfos(\Jelix\Core\App::appPath());
     if (!$infos->exists()) {
         throw new Exception("cannot load jelix-app.json or project.xml");
     }
     $this->infoLicence = $infos->license;
     $this->infoLicenceUrl = $infos->licenseURL;
     $this->infoCopyright = $infos->copyright;
     $this->infoWebsite = $infos->homepageURL;
     return $infos->name;
 }