This is a major update with significant new features, improved documentation, and a fair number of breaking changes.

Among the highlights:

• Separate client libraries are now provided for specific service versions.
• A new configuration mechanism makes it easier to control parameters such as endpoint address, network timeouts, and retry.
• A consistent method interface using keyword arguments for all fields, and supporting request proto objects.
• Helper methods for generating resource paths are more accessible.

See the MIGRATING file in the documentation for more detailed information, and instructions for migrating from earlier versions.