Bumping to 0.9.0 for release (googleapis#137)

Merge pull request googleapis#125 from google/shinfan-dev

Add builder pattern to AppEngine credentials

Bumping to 0.7.1 for release (googleapis#114)

Merge pull request googleapis#106 from tcoffee-google/master

Bumping to 0.7.0 for release

Prepare for Release (googleapis#97)

* Prepare for Release

1. Update versions to 0.7.0
2. Odd no one updated it to 0.7.0-SNAPSHOT earlier

* Update to 0.6.1

Add Rules to README.MD

Add README.md, CONTRIBUTING.md and CODE_OF_CONDUCT.md (googleapis#77)

Merge pull request googleapis#61 from google/release

Prepare for Release

[maven-release-plugin] copy for tag google-auth-library-parent-0.2.0

Release v0.1.0