Fix brand auth loop name
Merge pull request #522 from lovenunu/patch-1

Fix brand auth loop name
Fixes issue [#520](https://github.com/thelia/thelia/issues/520)
Merge branch 'export' of https://github.com/lovenunu/thelia into export
Create interfaces for documents and images exports
	modified:   core/lib/Thelia/Controller/Admin/ImportExportController.php
	new file:   core/lib/Thelia/ImportExport/DocumentsAwareInterface.php
	modified:   core/lib/Thelia/ImportExport/ExportHandler.php
	new file:   core/lib/Thelia/ImportExport/ImagesAwareInterface.php