add goreportcard badge

README.md

@@ -1,4 +1,4 @@
-# goga [![Build Status](https://travis-ci.org/tomcraven/goga.svg?branch=master)](https://travis-ci.org/tomcraven/goga) [![Coverage Status](https://coveralls.io/repos/tomcraven/goga/badge.svg?branch=master&service=github)](https://coveralls.io/github/tomcraven/goga?branch=master)
+# goga [![Build Status](https://travis-ci.org/tomcraven/goga.svg?branch=master)](https://travis-ci.org/tomcraven/goga) [![Coverage Status](https://coveralls.io/repos/tomcraven/goga/badge.svg?branch=master&service=github)](https://coveralls.io/github/tomcraven/goga?branch=master) [![Go Report Card](https://goreportcard.com/badge/github.com/tomcraven/goga)](https://goreportcard.com/report/github.com/tomcraven/goga)
 
 Golang implementation of a genetic algorithm. See ./examples for info on how to use the library.
 
@@ -88,4 +88,4 @@ Here's an example of what can be generated. Input, output and both overlayed ove
 
 ![input](https://cloud.githubusercontent.com/assets/5236109/10744734/01031bda-7c34-11e5-94ab-795afba114c1.gif)
 ![output](https://cloud.githubusercontent.com/assets/5236109/10744673/97a7aea8-7c33-11e5-8cfe-ea66489d8d9c.png)
-![overlayed](https://cloud.githubusercontent.com/assets/5236109/10744674/9ad23fa8-7c33-11e5-88d9-aff565cca6c4.png)
+![overlayed](https://cloud.githubusercontent.com/assets/5236109/10744674/9ad23fa8-7c33-11e5-88d9-aff565cca6c4.png)