Pretty up the demo a little.

Use images and some better formatting.  Also add scripts to help prevent typos.

This based on an improved version done by Julia Ferraioli.  She came up with the cool images.

examples/update-demo/1-create-replication-controller.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# Copyright 2014 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+if [ -z "$DOCKER_HUB_USER" ] ; then
+  echo "Please set DOCKER_HUB_USER to your Docker hub account"
+  exit 1
+fi
+
+set -x
+
+../../cluster/kubecfg.sh -p 8080:80 run $DOCKER_HUB_USER/update-demo:nautilus 2 update-demo