Some users have asked for an updated version in PyPI, so I'm doing some minor cleanup.
No real functionality changes, just modernizing things that would be considered more
standard 10+ years after this code was written.
- Added note about maintenance mode in README
- Cleaned up Python 3 compatibility (removed Python 2 support)
- Added minimal test for image consistency
- Added Docker image + GitHub workflow to build/publish it
- Fixed some minor bugs and improved error handling
- Added better CLI help text
The project is now officially in maintenance mode as noted in the README.
