Add License (MIT)

readme.md

@@ -5,7 +5,7 @@ A JSON Remote Agent Service | 一个远程JSON代理服务
 ![express:v4.13.4](https://img.shields.io/badge/express-v4.13.4-blue.svg)
 ![node:v6.3.1](https://img.shields.io/badge/node-v6.3.1-blue.svg)
 ![build:passing](https://img.shields.io/badge/build-passing-green.svg)
-![license:MIT](https://img.shields.io/badge/license-MIT-green.svg)
+[![license:MIT](https://img.shields.io/badge/license-MIT-green.svg)](/License)
 [![releases:v1.0.0](https://img.shields.io/badge/releases-v1.0.0-blue.svg)](https://github.com/xCss/JsonBird/releases)