Beta 5 contains important fix.
Beta 3 add --raw support for encrypted datasets.
Beta 2 contains important bugfixes.
New in v3:
* Complete rewrite, cleaner object oriented code.
* Python 3 and 2 support.
* Backwards compatible with your current backups and parameters.
* Progressive thinning (via a destroy schedule. default schedule should be fine for most people)
* Cleaner output, with optional color support (pip install colorama).
* Clear distinction between local and remote output.
* Summary at the beginning, displaying what will happen and the current thinning-schedule.
* More efficient destroying/skipping snapshots on the fly. (no more space issues if your backup is way behind)
* Progress indicator (--progress)
* Better property management (--set-properties and --filter-properties)
* Better resume handling, automaticly abort invalid resumes.
* More robust error handling.
* Prepared for future enhancements.