The README should be more helpful and welcoming. Right now it sucks and I hate projects with sucky READMEs

• Provide better usage documentation for people just using it as-is.
• Provide expanded section for additional middleware authors.
• Provide documentation for providing full middleware stacks
• Provide documentation for providing partial middleware stacks
• Table of

Describe the bug

The documentation for testing the Pub/Sub needs to be updated. The example:
gcloud pubsub topics publish stop-instance-event --project --message "{"command":"stop"}"

This is referring to an older topic name used (stop-instance-event) and should be changed to 'instance-scheduler-event'. The command also use double quotes to wrap the message and double quotes