state key/value object and the Rest API

I am trying to store arbitrary state using the state class here:

http://docs.buildbot.net/latest/developer/database.html?highlight=setstate#module-buildbot.db.state

And while this appears to work, I would like to know how I can either

1. access this directly from the REST API
2. create an endpoint to expose that data

My hope is that I can do this without modifying the source distribution, but via a set of steps and some other code running outside of the buildbot source.

Start with the state class documentation at developer/database.html and review the REST API documentation for any existing state exposure. Determine whether supported external configuration can provide access or whether an endpoint requires source changes; done means documenting the applicable steps and limitations.

Written by the indexing model from the issue text.