Add missing favicons
add a profile walker to automatically send won challenges
Add weboob.tools.misc to tests
filters: Add Unicode normalization to CleanText

With a default to 'NFC'.
This is inspired by python-ftfy, which has a nice explanation of the modes:
https://github.com/LuminosoInsight/python-ftfy

I think K is too strong to be a default, however C has zero visual differences
and should be the most common way to represent Unicode characters.
form: Add comments
Tests method Groupe Julia Lille1

Signed-off-by: juliaL03 <julia.leven@etudiant.univ-lille1.fr>
browser tests: Fixes

pyflakes/pep8, test name in setup.cfg, remove useless comments
browser tests: More Pythonic names