Update README.md [skip ci]

Author: z-song

README.md

@@ -1,8 +1,15 @@
-laravel-admin-ext/api-tester
+API tester for laravel-admin
 ============================
 
+[![StyleCI](https://styleci.io/repos/99563385/shield?branch=master)](https://styleci.io/repos/99563385)
+[![Packagist](https://img.shields.io/packagist/l/laravel-admin-ext/api-tester.svg?maxAge=2592000)](https://packagist.org/packages/laravel-admin-ext/api-tester)
+[![Total Downloads](https://img.shields.io/packagist/dt/laravel-admin-ext/api-tester.svg?style=flat-square)](https://packagist.org/packages/laravel-admin-ext/api-tester)
+[![Pull request welcome](https://img.shields.io/badge/pr-welcome-green.svg?style=flat-square)]()
+
 Inspired by [laravel-api-tester](https://github.com/asvae/laravel-api-tester).
 
+[Documentation](http://laravel-admin.org/docs/#/en/extension-api-tester) | [中文文档](http://laravel-admin.org/docs/#/zh/extension-api-tester)
+
 ## Screenshot
 
 ![wx20170809-164424](https://user-images.githubusercontent.com/1479100/29112946-1e32971c-7d22-11e7-8cc0-5b7ad25d084e.png)