Add blue green deployment example app

blue-green-deploy/components/params.libsonnet

@@ -0,0 +1,19 @@
+{
+  global: {
+    // User-defined global parameters; accessible to all component and environments, Ex:
+    // replicas: 4,
+  },
+  components: {
+    // Component-level parameters, defined initially from 'ks prototype use ...'
+    // Each object below should correspond to a component in the components/ directory
+    "bg-guestbook": {
+      containerPort: 80,
+      image: "gcr.io/heptio-images/ks-guestbook-demo:0.1",
+      name: "bg-guestbook",
+      replicas: 3,
+      servicePort: 80,
+      type: "LoadBalancer",
+    },
+    "bg-workflow": {},
+  },
+}