When trying to [download a file](https://github.com/netgen/NetgenEnhancedBinaryFileBundle/blob/master/bundle/Resources/config/routing.yml#L1) though the custom admin interface, so [the corresponding method in the `DownloadController`](https://github.com/netgen/NetgenEnhancedBinaryFileBundle/blob/master/bundle/Controller/DownloadController.php#L71) a php error is triggered if the OriginalFilename of the file contains umlauts.  Possible solution could be to wrap the original filename in CDATA tag? 