Use AR associations to write User.scores_by_team.
Fix gread <-> team association.
Testing highcharts.
Generate highchart.

Highchart takes awhile to load when categories are provided.
Fix data formatting.

Chart is still blank.
Show chart in /charts/team_grade.

Chart appears blank due to what appears to be a styling issue.
Calculate points for Highcharts.
Fix controller and sorting.
Grab team names in query. Fix sorting.
Merge pull request #394 from bellotastudios/team-plots

Plot of team-grade distribution.