src/devilry_student/devilry_student/rest/aggregated_groupinfo.py
* Added registration field to decide whether user is a related student
  on the period
src/devilry_student/devilry_student/rest/aggregated_groupinfo.py
* Added attribute "is_registrated" for check on whether a student is
  registrated. Red box warning north in groupview border is shown on
  false condititon.
Merge branch 'no-registration-warning' of github.com:devilry/devilry-django into no-registration-warning