Change link in install instruction (Setuptools). Fix #949.
Change link in install instruction (Setuptools). Fix #949.

FinnStutzenstein/OpenSlides,emanuelschuetze/OpenSlides,jwinzer/OpenSlides,normanjaeckel/OpenSlides,tsiegleauq/OpenSlides,normanjaeckel/OpenSlides,ostcar/OpenSlides,jwinzer/OpenSlides,boehlke/OpenSlides,ostcar/OpenSlides,tsiegleauq/OpenSlides,boehlke/OpenSlides,ostcar/OpenSlides,FinnStutzenstein/OpenSlides,OpenSlides/OpenSlides,boehlke/OpenSlides,emanuelschuetze/OpenSlides,boehlke/OpenSlides,CatoTH/OpenSlides,normanjaeckel/OpenSlides,tsiegleauq/OpenSlides,CatoTH/OpenSlides,jwinzer/OpenSlides,rolandgeider/OpenSlides,rolandgeider/OpenSlides,CatoTH/OpenSlides,rolandgeider/OpenSlides,CatoTH/OpenSlides,emanuelschuetze/OpenSlides,jwinzer/OpenSlides,FinnStutzenstein/OpenSlides,emanuelschuetze/OpenSlides,jwinzer/OpenSlides,OpenSlides/OpenSlides,normanjaeckel/OpenSlides,FinnStutzenstein/OpenSlides