Release google-cloud-core 0.21.1

* Support the new GAE Flex beta environment.

Add branches to ignore from CircleCI

These branches have support libraries and should not be built by CircleCI.

Release Translate 0.22.1

* Add missing googleauth dependency (frankyn)

Release Logging 0.21.2

* Fix issue with uninitialized VERSION (remi)

Release 0.22.0 gems

Release Natural Language, Translate, Google Cloud, and Gcloud gems.

Release 0.22.0 gems

Release Natural Language, Translate, Google Cloud, and Gcloud gems.

Release 0.22.0 gems

Release Natural Language, Translate, Google Cloud, and Gcloud gems.

Release 0.22.0 gems

Release Natural Language, Translate, Google Cloud, and Gcloud gems.

Release Google Cloud 0.21.1

* No changes.

Release stackdriver v0.3.0