Can't run lis with accent in input or output paths of json configuration (unicode error)

from: http://tully.ups-tlse.fr/grizonnet/let-it-snow/issues/28

Traceback (most recent call last): File "/home/grizonnetm/etudes/bin/lis/app/run_snow_detector.py", line 52, in main(sys.argv) File "/home/grizonnetm/etudes/bin/lis/app/run_snow_detector.py", line 39, in main sd = snow_detector.snow_detector(data) File "/home/grizonnetm/.local/lib/python2.7/site-packages/s2snow/snow_detector.py", line 112, in init self.path_tmp=str(general.get("pout")) UnicodeEncodeError: 'ascii' codec can't encode character u'\xe9' in position 65: ordinal not in range(128)