R1:5ca359dd8b5e

Marginally improve Phabricator landing page.

Summary:
Make it slightly less terrible. Make sure to use tables for layout.

Test Plan:
Looked at it.

Reviewed By: tomo
Reviewers: aran, tomo, tuomaspelkonen, jungejason
CC: aran, epriestley, tomo
Differential Revision: 196