Update README

Author: ynqa

README.md

@@ -1 +1,40 @@
 # kubernetes-rust
+
+[![Client Support Level](https://img.shields.io/badge/kubernetes%20client-alpha-green.svg?style=flat&colorA=306CE8)](http://bit.ly/kubernetes-client-support-badge)
+
+Rust client for [Kubernetes](http://kubernetes.io) API.
+
+## Example
+
+List all Pods on `kube-system`:
+
+```rust
+extern crate failure;
+extern crate k8s_openapi;
+extern crate kubernetes_rust;
+
+use k8s_openapi::v1_10::api::core::v1;
+use kubernetes_rust::client::APIClient;
+use kubernetes_rust::config;
+
+fn main() {
+    let kubeconfig = config::load_kube_config().expect("failed to load kubeconfig");
+    let kubeclient = APIClient::new(kubeconfig);
+    let req = v1::Pod::list_core_v1_namespaced_pod(
+        "kube-system",
+        None,
+        None,
+        None,
+        None,
+        None,
+        None,
+        None,
+        None,
+        None,
+    ).expect("failed to define list pod");
+    let list_pod = kubeclient
+        .request::<v1::PodList>(req)
+        .expect("failed to list up pods");
+    println!("{:?}", list_pod);
+}
+```