Add status badges

README.md

@@ -1,5 +1,12 @@
 # goplay - The Go Playground (https://play.golang.org/) client 
 
+[![Travis Build Status](https://travis-ci.org/haya14busa/goplay.svg?branch=travis)](https://travis-ci.org/haya14busa/goplay)
+[![Go Report Card](https://goreportcard.com/badge/github.com/haya14busa/goplay)](https://goreportcard.com/report/github.com/haya14busa/goplay)
+[![Coverage Status](https://coveralls.io/repos/github/haya14busa/goplay/badge.svg)](https://coveralls.io/github/haya14busa/goplay)
+[![Releases](https://img.shields.io/github/tag/haya14busa/goplay.svg)](https://github.com/haya14busa/goplay/releases)
+[![LICENSE](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
+[![GoDoc](https://godoc.org/github.com/haya14busa/goplay?status.svg)](https://godoc.org/github.com/haya14busa/goplay)
+
 ### Install
 
 as a Library
@@ -27,3 +34,7 @@ SYNOPSIS: goplay [OPTION]... [FILE] (With no FILE, or when FILE is -, read stand
   -share
         share code on The Go Playground (default true)
 ```
+
+:bird: Author
+-------------
+haya14busa (https://github.com/haya14busa)