Added update_topology command hint in README
Added update_topology command hint in README

netjson/django-netjsongraph,netjson/django-netjsongraph,interop-dev/django-netjsongraph,netjson/django-netjsongraph,interop-dev/django-netjsongraph,interop-dev/django-netjsongraph,netjson/django-netjsongraph