Merge branch '69-add-support-for-assinging-class-roles' into 'master'

aleksis/apps/alsijil/forms.py

aleksis/apps/alsijil/managers.py

aleksis/apps/alsijil/menus.py

aleksis/apps/alsijil/migrations/0009_group_roles.py

aleksis/apps/alsijil/models.py

aleksis/apps/alsijil/preferences.py

aleksis/apps/alsijil/rules.py

aleksis/apps/alsijil/tables.py

...apps/alsijil/templates/alsijil/class_register/groups.html

...apps/alsijil/templates/alsijil/class_register/lesson.html

...s/alsijil/templates/alsijil/class_register/week_view.html

...sis/apps/alsijil/templates/alsijil/group_role/assign.html

...s/alsijil/templates/alsijil/group_role/assigned_list.html

aleksis/apps/alsijil/templates/alsijil/group_role/chip.html

...sis/apps/alsijil/templates/alsijil/group_role/create.html

aleksis/apps/alsijil/templates/alsijil/group_role/edit.html

...alsijil/templates/alsijil/group_role/edit_assignment.html

aleksis/apps/alsijil/templates/alsijil/group_role/list.html

...templates/alsijil/group_role/partials/assigned_roles.html

...jil/templates/alsijil/group_role/partials/assignment.html