Unclutter-directory

Add support for directory rules.

- Add support for RAR files.
- Fix bug where don't delete the original file after compression.
- Better validation.

Extract the ClickGroup to an external repository.
Update README.

**Full Changelog**: https://github.com/zirition/unclutter-directory/compare/0.9.1...0.9.2

Update README.md with pip instructions.

First version