Tightened kerning on logos

Summary: Fixes T3592, hand kerned the logo and dropped it's size 2 px.

Test Plan: pixels in photoshop, dry run in sandbox

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T3592

Differential Revision: https://secure.phabricator.com/D6505