Add a warning when downloading the docker image
Add a warning when downloading the docker image

caseydavenport/calico-containers,insequent/calico-docker,projectcalico/calico-docker,Metaswitch/calico-docker,projectcalico/calico-containers,insequent/calico-docker,caseydavenport/calico-containers,caseydavenport/calico-docker,caseydavenport/calico-containers,projectcalico/calico-containers,caseydavenport/calico-docker,projectcalico/calico-containers,Metaswitch/calico-docker,projectcalico/calico-docker