COOK-831 - add README.md where it was missing completely
COOK-831 - add README.md where it was missing completely

jujugrrr/varnish,cookbooks/oc-varnish,gusrc/varnish,rackspace-cookbooks/varnish,jujugrrr/varnish,TAKEALOT/varnish,KierranM/varnish,gusrc/varnish,bitzesty/varnish,gsreynolds/varnish,gsreynolds/varnish,TAKEALOT/varnish,NREL-cookbooks/varnish,yoshiwaan/varnish,elastera/varnish,GannettDigital/chef-varnish,KierranM/varnish,gusrc/varnish,elastera/varnish,yoshiwaan/varnish,rackspace-cookbooks/varnish,GannettDigital/chef-varnish,rackspace-cookbooks/varnish,NREL-cookbooks/varnish