Update README.md

README.md

@@ -3,6 +3,7 @@
 [![Build Status](https://travis-ci.org/rbnvrw/nd2reader.svg?branch=master)](https://travis-ci.org/rbnvrw/nd2reader)
 [![Test Coverage](https://codeclimate.com/github/rbnvrw/nd2reader/badges/coverage.svg)](https://codeclimate.com/github/rbnvrw/nd2reader/coverage)
 [![Code Climate](https://codeclimate.com/github/rbnvrw/nd2reader/badges/gpa.svg)](https://codeclimate.com/github/rbnvrw/nd2reader)
+![(score out of 4.0)](https://cdn.rawgit.com/rbnvrw/nd2reader/6f4536f1/badge.svg)
 
 ### About