#2035 Graph contributor activity
Graph showing the how many users have been "active" in the past 30, 90 and 180 days.
Active == done anything (scm commit, file release, metadata update, forum post, wiki edit, etc) except consumer activities (e.g. post a review).
Check with Mark, but I think it'd make sense to do Classic & Beta separately.
It seems like this will end up being pretty similar to [#2033]. Also, do we want to count anonymous contributions somehow?