Added statistics and graphs
Merge branch 'staging' into gh-1574
Added recent changes to statistics
Fix title of team statistics
Ordered statistics by their values, fixed legends
Improved tooltips in statistics
Tentative fix for mouse over on Chrome in statistics
Merge branch 'staging' into gh-1574
Some styling improvements for graphs
More styling improvements with graphs
cleaned up variable names
Fixed a couple console errors.

The language selection changes make it so that the reference language
is sometimes null.
Update angular to 1.2.7.

I originally did this to try to fix the loading issue.  It didn't
help, but it seems like upgrading makes sense anyway.
Merge branch 'staging' into gh-1574
Fix issue with languages number calculation in stats page
Added most active users and limit size
language stats split into in progress and published
published and in progress subtitles are given as metadata in graphs
Properly limit graphs to first N elements, and plot longest bars at the top
Workaround Chrome bug with encoding in graphs