2012-07-17 Kazuhiko
* do not use birthday property in Credential Request or Credential Update, because its storage is start_date and start_date has different meaning in these portal types.

2012-04-27 Kazuhiko
* use document_reference in Credential Recovery as the reference of nofitication message if exists.

2010-05-27 fabien
* implement Credential Request, add class, improve forms, ...
* Rename credential_question base category to question and add sub categories.