v0.2.2
v0.2.2

= Enhancement

- Mamiya sent `prepare` request at least once even if
  all agents have already prepared.

= Bug fixes

- s3 storage now raises error when failed to remove packages

= Documentation

- Added quick start guide.

sorah/mamiya,miyagawa/mamiya,sorah/mamiya,hcliu/mamiya,miyagawa/mamiya,hcliu/mamiya