// Send password by e-mail if it has been modified, even if encrypted in DB (it doesn't make sense to send an e-mail with login info without the password, even if the password is encrypted)
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University - ability for course admins to specify wether uploaded documents are visible or invisible by default.
* @author Roan Embrechts, code refactoring and virtual course support