0.7.2

FEATURES:

• Added support for private repositories. You can pass --docker-auth argument with
  path to file in the same format as ~/.docker/config.json. Auth credentials
  from this file will be used in pull-image requests

BUG FIXES:

• Fixed infinity waiting on 304 http responses (e.g. docker stop response)
• Fixed incorrect handling of pulling errors
• Fixed file descriptor leak in Consul.deregister_service