Add github.com/chai2010/gettext-go dependency

vendor/github.com/chai2010/gettext-go/gettext/hello.go

@@ -0,0 +1,22 @@
+// Copyright 2013 <chaishushan{AT}gmail.com>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/chai2010/gettext-go"
+)
+
+func main() {
+	gettext.SetLocale("zh_CN")
+	gettext.BindTextdomain("hello", "../examples/local", nil)
+	gettext.Textdomain("hello")
+
+	fmt.Println(gettext.Gettext("Hello, world!"))
+	// Output: 你好, 世界!
+}