renaming folder to v1beta3 and updating testcases

examples/guestbook-go/v1beta3/README.md

@@ -0,0 +1,14 @@
+## GuestBook v1beta3 example
+
+This example shows how to build a simple, multi-tier web application using Kubernetes and Docker.
+
+The example consists of:
+- A web frontend
+- A redis master (for storage and a replicated set of redis slaves)
+
+The web front end interacts with the redis master via javascript redis API calls.
+
+The v1beta3 API is not enabled by default. The kube-apiserver process needs to run with the --runtime_config=api/v1beta3 argument. Use the following command to enable it:
+$sudo sed -i 's|KUBE_API_ARGS="|KUBE_API_ARGS="--runtime_config=api/v1beta3 |' /etc/kubernetes/apiserver
+
+