Gigawork

- Fix A and D change type
- Updated `batch.py` (it now refers to a CSV file, and no longer list a folder in order to get the list of repository to process)

- Fix deployment to PyPI issue

- Change the default output to one file instead of two.

- Add better workflow recognition.
- Add three new columns : `valid_yaml`, `probably_workflow` and `valid_workflow`.
- Add `R` change type. It represents a renaming without modification of the content.

- Add previous file hash and previous file path to the output CSV table.
- Renames are now handled as "Modified".
- Allow the separation of auxiliary files.

Take into account comments made in 3.