THE MASKS FOR THE GROUPS
- name: name a group, e.g. 'kein mensch ist illegal'.
- email: e-mail of the group. If given, it will always be published. optional.
- homepage: homepage of the group. If given, it will always be published. optional.
- adresse: postal adress of the group. If given, it will always be published. optional.
- telefon: telephone number of the group. If given, it will always be published. optional.