ZFS autobackup v3 - TEST VERSION

Official releases are here: https://github.com/psy0rz/zfs_autobackup/releases

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 effient destroying/skipping snaphots 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 enhanchements.
• Supports raw backups for encryption.