juju/juju — pull request #784 by axw (2014-09-18 06:05:34+00:00)
Title: state: refactor Storage

- State.Storage() no longer returns an error
- state.Storage no longer has a Close method

Resource lifetime is now managed within each method call. Get is a special
case, where the returned ReadCloser manages the lifetime of the mgo session
(it is closed when the ReadCloser is closed).