Pub/Sub surface doc title should be "Summary" or "Quick start" or "Overview" or "Common tasks"

Doc in reference: http://googlecloudplatform.github.io/gcloud-python/latest/pubsub-surface.html

Any votes on the options (or new ideas) ?
- Summary
- Quick start
- Overview
- Common tasks
