google-cloud-pubsub 0.23.0

• Add auto-commit feature for batches (#2966)
• Do not attempt to acknowledge 0 messages (#2879)
• Docs: Expand motivation in Subscription.reload docstring. (#3047)
• google.cloud.pubsub.__version__ attribute added (#3046)
• On HTTP requests, sending X-Goog-API-Client header with value gl-python/x.y.z gccl/a.b.c where x.y.z is the version of Python that is running and a.b.c is the version of the Pub / Sub package being used (#3046)
• Sending Pub / Sub package version with gRPC requests (#3052, related to #3046)
• Storing all connection data on Client instead of on private Connection (#2970)
• Changing from Beta to Alpha classifier (#3027)

PyPI: https://pypi.python.org/pypi/google-cloud-pubsub/0.23.0