subjectadmin...AssignmentOverview: Hide examinerbox when no groups.
docs.devenv: Fixed errors.
docs.buildout: Fixed errors.
docs: Prepare for release.
subjectadmin...Dashboard: Include other guides and help section.

#359.
devilry_settings|subjectadmin: Disable qualifiedforexam.
subjectadmin: Translations.
docs.release: How to make a release.