detect when there is no operations
local_run: Do not capture stderr
new recipe backend : supertoinette
[supertoinette] favicon
corrections on comments and accents striping in all recipe backends
[supertoinette] useless imports
new lyrics backend: parolesnet
[parolesnet] favicon
support new authentication (with an unique image)
[kickass] ka.tt seems not to be reachable from france, backend now tries the two URLs
home method is useless on torrent backends
[booblyrics] search command needs 2 arguments
[seeklyrics] fix bad parsing in some cases
Tools to remove stale pyc files
Faster walk by excluding some directories
Remove stale .pyc files before tests and local run

This should make running tests faster, as we do not remove all .pyc
files anymore!
Fix comparison to None
fix encoding error to get history for accounts with special chars in name
weboob-config edit: fix error if there are private attributes on backend

(for example _enabled or _proxy)
fix navigation for deferred cards