juju/juju — pull request #435 by mjs (2014-07-31 00:38:53+00:00)
Title: Update Juju 1.20 to work with latest mgo

This required to deal with a mgo bug (LP #1318366). The mgo repo changed location after 1.20 so this update is more complex than it otherwise would have been.

Although the change is mostly about dependencies and import paths, a test change was also required due to changes in mgo's internal behaviour.