Add config template plugin examples (#7)

plugins/kustomized-helm/README.md

@@ -0,0 +1,30 @@
+# Helm + Kustomize
+
+Sometimes Helm chart don't have all required parameters and additional customization is required. This example application demonstrates how to combine Helm and Kustomize and use it
+as a config management plugin in Argo CD.
+
+Use following steps to try the application:
+
+* configure `kustomized-helm` tool in `argocd-cm` ConfigMap:
+
+```yaml
+  configManagementPlugins: |
+    - name: kustomized-helm
+      init:
+        command: [helm, dependency, build]
+      generate:
+        command: [sh, -c]
+        args: ["helm template . > all.yaml && kustomize build"]
+```
+
+* create application using `kustomized-helm` as a config management plugin name:
+
+
+```
+argocd app create kustomized-helm \
+    --config-management-plugin kustomized-helm \
+    --repo https://github.com/argoproj/argocd-example-apps \
+    --path plugins/kustomized-helm \
+    --dest-server https://kubernetes.default.svc \
+    --dest-namespace default
+```