Fix guestbook pod and service names
Add go boilerplate
Use role label for redis pods
Give service.containerPort a name based value

This gives better env variable keys like REDIS_MASTER_SERVICE_REDIS_SERVER_ADDR, etc.
Avoid unnecessarily long names for service (esp in env vars)
Adding guestbook deploy/destroy scripts for k8s

These are probably only useful for quick testing. Maybe remove them
before merging the pull request.
Part of avoiding long names for services