Change some invalid arguments in CLI.
Create a new module `security` for creating passwords.
Merge branch 'develop' of /media/med/merchise-git/xoutil into develop
Merge branch 'develop' of /media/med/merchise-git/xoutil into develop
Add function to delete duplicates in lists, tuples and strings.
Fix `normalize_slug` function.
Improve `create_password` algorithm.