Switching layout to 7 cols, auto-width, travis on side
Exclude users without scores from leaderboard
Better trend styling
Redesign: More compact, higher contrast

Better fit for wallboards
Fixed weighting calc
Hide travis branches if all passed, fix overall build status class, branch whitelist to avoid feature branches showing
Corrected meta information
Hard-limit date count, don't rely on API params

Github interprets the "since" API parameter based on different values,
so we'll check for created_at. Lots of duplication, planning a refactor
to return non-grouped results from github_backend.rb which will remove that.
More leader board info