Merge pull request #2941 from BorisBorshevsky/report-card

add report card to readme.md

README.md

-# Beego [![Build Status](https://travis-ci.org/astaxie/beego.svg?branch=master)](https://travis-ci.org/astaxie/beego) [![GoDoc](http://godoc.org/github.com/astaxie/beego?status.svg)](http://godoc.org/github.com/astaxie/beego) [![Foundation](https://img.shields.io/badge/Golang-Foundation-green.svg)](http://golangfoundation.org)
+# Beego [![Build Status](https://travis-ci.org/astaxie/beego.svg?branch=master)](https://travis-ci.org/astaxie/beego) [![GoDoc](http://godoc.org/github.com/astaxie/beego?status.svg)](http://godoc.org/github.com/astaxie/beego) [![Foundation](https://img.shields.io/badge/Golang-Foundation-green.svg)](http://golangfoundation.org) [![Go Report Card](https://goreportcard.com/badge/github.com/astaxie/beego)](https://goreportcard.com/report/github.com/astaxie/beego)
+
 
 beego is used for rapid development of RESTful APIs, web apps and backend services in Go.
 It is inspired by Tornado, Sinatra and Flask. beego has some Go-specific features such as interfaces and struct embedding.