Changes this release:
  https://github.com/zrepl/zrepl/blob/0.0.3/docs/changelog.rst

Breaking changes with the 0.0.3 release:
- Snapshots are automatically bookmarked and pruning of bookmarks must
  be configured by adding the keep_bookmarks parameter to the prune
  policy section of the zrepl configuration file (source side only).
  Be sure to understand the meaning bookmarks have for maximum
  allowable replication downtime.
- The ssh+stdinserver transport protocol has changed, requiring zrepl
  to be updates on both the sending and receiving side, and the daemon
  restarted on both sides.
- The first outlet in the global.logging section of the configuration
  file is now used for logging meta-errors (e.g. problems encountered
  when writing to other logging outlets).