Proposal: Initial namespaces proposal

This is based on feedback and discussion that came out of #1017 

There was discussion that the term project may be problematic, so have removed it in favor of namespace.

I think this aligns nicely with the ACL model discussed thus far.

Feedback appreciated.

@erictune @lavalamp @smarterclayton 


Virtually any automation that a user would run for themselves rather than for all users of a cluster: deployment update tool or service, autoscaler, worker pool manager, workflow orchestrator, ... These should all watch rather than poll.