Merge branch 'issues/16'

* issues/16:
  Set project version to 0.2.1
  Add documentation for systemd and sysusers.d integration
  Add example for systemd integration
  Add example for sysusers.d integration
  Set default sync dir to /var/lib/arch-release-sync
4 jobs for 0.2.1 in 1 minute and 13 seconds (queued for 6 seconds)
latest