Idea: workgroups

I think it would be useful to have a page for the workgroups.

With such a page it would be more visible for the members of the organization what workgroups we have and what they are currently working on.

On this page you should be able to find:
- a short descriptions
- the notulen
- who to contact
- manage persons in the workgroup (maybe)

This is just a rough idea, feel free to make changes