== retrieve files
sort_by_user False
error: 'bool' object has no attribute 'endswith'
  File "./fdh.py", line 20, in <module>
    sys.exit(flickr_download_helper.main(api, token))
  File "/home/teuf/Images/fdh_version0.1/bin/flickr_download_helper/__init__.py", line 250, in main
    size = downloadPhotoFromURL(url, filename)
  File "/home/teuf/Images/fdh_version0.1/bin/flickr_download_helper/api.py", line 446, in downloadPhotoFromURL
    link_dest = os.path.join(OPT.new_in_dir, os.path.basename(filename))
  File "/usr/lib64/python2.7/posixpath.py", line 67, in join
    elif path == '' or path.endswith('/'):