Group people into active / inactive

_config.yml

_includes/menu_sub.html

_includes/people_list.html

people/README.md

people/akohlhase.md

people/cjucovschi.md

people/clange.md

people/cmueller.md

people/dginev.md

people/dmueller.md

people/fhorozal.md

people/former.html

people/frabe.md

people/hstamerjohanns.md

people/index.html

people/index.md

people/inormann.md

people/jbetzendal.md

people/miancu.md

people/mkohlhase-activities.md