re-instate 'make publish'

and call it from the release script

bin/release

@@ -120,13 +120,8 @@ publish() {
 
     echo '** Sanity checks OK for publishing tag' $LATEST_TAG as $DOCKERHUB_USER/weave:$VERSION
 
-    for IMAGE in weave weavedns weavetools ; do
-        echo == Tagging $DOCKERHUB_USER/$IMAGE as $VERSION
-        $SUDO docker tag  $DOCKERHUB_USER/$IMAGE $DOCKERHUB_USER/$IMAGE:$VERSION
-        $SUDO docker push $DOCKERHUB_USER/$IMAGE:$VERSION
-        $SUDO docker push $DOCKERHUB_USER/$IMAGE:latest
-        echo "** Pushed $DOCKERHUB_USER/$IMAGE:$VERSION to docker hub"
-    done
+    echo "== Tagging and publishing images on docker hub as user $DOCKERHUB_USER"
+    make SUDO=$SUDO WEAVE_VERSION=$VERSION DOCKERHUB_USER=$DOCKERHUB_USER publish
 
     echo "== Creating GitHub release $RELEASE_NAME $VERSION"
     # This cannot be done as a draft because of a bug in