Fix the sdist.
Release v0.0.8. Changes since the previous version:

* Simpler CLI usage, making cross-volume operation implicit
* Cleaner status output
* scan, dedup and reset now take either filesystems or volumes
  and recurse into subvolumes (excluding frozen ones)
* scan and dedup can be used without a positional argument,
  and will deduplicate any mounted filesystem
* Warn when a volume argument prevents optimal cross-volume dedup
* Filesystems can be auto-mounted by passing a device or a uuid
* `bedup --help` output has been cleaned up
* Command and subcommand names were shortened
* New and updated commands to wipe metadata and tracking,
  subject to user confirmation
* Documented version requirements for SQLite, glibc, and kernel headers
* Refactored filesystem discovery, made it aware of Btrfs RAID
* Major improvements to memory use and cpu time in the dedup phase,
  with thanks to Henrik Rusche