devilry/apps/core/models/period.py: Added missing documentation for relatedstudents and relatedexaminers
devilry/apps/core/models/period.py: Added missing documentation for relatedstudents and relatedexaminers

vegarang/devilry-django,devilry/devilry-django,devilry/devilry-django,devilry/devilry-django,vegarang/devilry-django,devilry/devilry-django