Merge branch 'hotfix'
Making a single query by converting queryset to a list.
Merge pull request #626 from bcipolli/coach_reports_debacle

Making a single query by converting queryset to a list.
Merge branch 'hotfix' into release-0.10
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into release-0.10