Show lint issues inline in Differential

Summary:
Take lint information and use it to render synthetic inline comments in
Differential.

Test Plan:
https://secure.phabricator.com/file/view/PHID-FILE-2uapwmf5tqhgscbuty3b/

Reviewers: btrahan, jungejason

Reviewed By: btrahan

CC: aran, btrahan, epriestley, pad

Maniphest Tasks: T24

Differential Revision: https://secure.phabricator.com/D1309