State should not depend on the API server

[David Cheney]

Hello,

This is an introductory email to explain my upcoming series of pull requests.

The theme is simple: state must not depend on the api server.

This is currently not true, state depends on api/params because some
of the api types have leaked into the state package and are being
directly stored in mongo.

Please speak up if you disagree with this proposal.

Dave