Issue on page /courses/hello-world/index.html - consider adding number enrolled/completed

[sgbaird]

Not exactly sure where. It's a bit crowded with badges. I should probably drop "issues" badge. Perhaps a course stats table either above or below the buttons. Could be a full width single row table with header. Maybe total hours spent across all students based on self-reported values and median + stdDev time to completion (again based on self-reported values).