R1:78784aa1fe86

Group applications into groups on /applications/

Summary: So they're maybe a little easier to deal with? I'm going to take this formally to "plz @chad plz help" land.

Test Plan: {F20329}

Reviewers: btrahan, vrana, chad

Reviewed By: vrana

CC: aran

Differential Revision: https://secure.phabricator.com/D3609