Handle more pathologies in post data

This release handles several pathologies discovered in archive files generated between July 2018 and September 2021. That includes a character encoding issue that was triggered by my own posts on Facebook describing a character encoding issue in the post data. 😵‍💫

Better documentation, better build script

For this release, the documentation saw extensive TLC. Furthermore, the bespoke build script run.py has been refactored to use internal namespaces for utility functions and to more aggressively validate some operations. It's now at a little over 500 lines of code.

deface reaches feature completeness

• The model can be reinstated from JSON through from_dict() class methods
• The run.py build utility bootstraps the virtual environment and installs dependencies automatically

Initial release

deface ingests one or more your_posts_n.json files from Facebook data archives, simplifies and cleans the posts, and then writes the clean posts to standard output. This first release marks the fact that the command line tool is feature complete.