Add an Atom controller to Diviner
Summary: Ref T988. Lots of rough edges still, but this pulls the right data and dumps it into a reasonable-looking shell.
Test Plan: {F44883}
Reviewers: chad, btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T988
Differential Revision: https://secure.phabricator.com/D6104