juju/charm — pull request #52 by rogpeppe (2014-09-24 10:18:05+00:00)
Title: charm: allow for juju-info relation

[This is a duplicate of PR #51 but targeted to v4]

We add a bundle that uses it for verification (and because we wanted
another simple bundle anyway).

As a drive-by fix, we change VerifyWithCharms to make it easier
to verify without verifying constraints.