Problem to solve
make it possible for users to register via different ways:
- local registration
- ldap registration (e: using https://github.com/django-auth-ldap/django-auth-ldap)
cas registration (? marked as a requirement from the LORIA, but not sure to be usable)see #11
having an invite system could be interesting too.
end user, but also impacting moderation since the invite system could reduce the need for punctual opening/closing of registrations.