------------------
- Allow short number to be anything between 100 and 9999
[datakurre]
- Plone 5 compatibility: Optionally import ``checkEmailAddress`` and
``EmailAddressInvalid`` from CMFPlone respectively CMFDefault.
[thet]
- Add file type checking for person portrait image
[Grrandi, datakurre]
- Change studysubject behavior label from 'Studysubject' to 'Subject'
[Grrandi, datakurre]
- Refactored grokless public release.
[datakurre]