R1:9d5d59f75949

Move back to black for remarkup, up line height

Summary: Moves default color back to black, increases line-height to clean new object borders

Test Plan: Review lots of remarkup in sb, this is same height as "document" CSS.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D18249