apps.core.models.assignment: i18n.
apps.core.models.assignment: Tuned help texts.
devilry_gradingsystem...summary: Usable.
devilry_gradingsystem...test_select_points_to_grade_mapper: Fixed h1 test.
devilry_gradingsystemplugin_approved: Tuned wording to passed/failed

as opposed to approved/not approved.