Deprecate in favor of Kubernetes

[mrocklin]

This library does not see much maintenance love. With the adoption of Kubernetes across all cloud platforms we might consider pointing people to that instead.

http://dask.pydata.org/en/latest/setup/kubernetes.html

This would involve at least putting loud disclaimers in the README and docs. We might also make a new release that errs informatively.

cc @danielfrg

[danielfrg]

+100 :)

When I started the k8s heml chart for dask it was one of the intentions.