Merge pull request prometheus#18 from d-m-u/bump_version

bump version for recent faraday adjustment

Merge pull request prometheus#14 from prometheus/bump-version

Bump bugfix version

bump minor version (remove cadvisor client)

reduce min faraday dependency

Merge pull request #8 from yaacov/bump-version

Bump minor version

bump version

bump version

Update README.md

Update README.md