Update numbers more often

Summary: To my eye, 90 ms still looks very fast but 100 ms and up feel noticeably slower. I switched the font out for Avenir because Roadgeek2005SeriesD's numbers aren't all the same width. Also changed it to update data once per day instead of once per milliday, as I assume days were intended, but no other functional changes.

Reviewers: dylan

Reviewed By: dylan

Differential Revision: http://phabricator.khanacademy.org/D3279