Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/golang.org/x/tools/playground/local.go

@@ -0,0 +1,20 @@
+// Copyright 2012 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !appengine
+
+package playground
+
+import (
+	"log"
+	"net/http"
+)
+
+func client(r *http.Request) *http.Client {
+	return http.DefaultClient
+}
+
+func report(r *http.Request, err error) {
+	log.Println(err)
+}