Add a Go Report Card badge to the readme.

README.md

@@ -1,10 +1,13 @@
 [![Build Status](https://travis-ci.org/limetext/lime-termbox.svg?branch=master)](https://travis-ci.org/limetext/lime-termbox)
 [![Coverage Status](https://img.shields.io/coveralls/limetext/lime-termbox.svg?branch=master)](https://coveralls.io/r/limetext/lime-termbox?branch=master)
+[![Go Report Card](http://goreportcard.com/badge/limetext/lime-termbox)](http://goreportcard.com/report/limetext/lime-termbox)
+
 [![GoDoc](https://godoc.org/github.com/limetext/lime-termbox?status.svg)](https://godoc.org/github.com/limetext/lime-termbox)
+
 [![Bountysource Bounties](https://www.bountysource.com/badge/team?team_id=8742&style=bounties_received)](https://www.bountysource.com/teams/limetext/issues?utm_source=limetext&utm_medium=shield&utm_campaign=bounties_received)
 [![Bountysource Raised](https://www.bountysource.com/badge/team?team_id=8742&style=raised)](https://www.bountysource.com/teams/limetext?utm_source=limetext&utm_medium=shield&utm_campaign=raised)
 
-[![Gitter](https://badges.gitter.im/Join Chat.svg)](https://gitter.im/limetext/lime)
+[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/limetext/lime)
 
 
 # lime-termbox