README.md in systemcall-1.0.1 vs README.md in systemcall-1.0.2

- old
+ new

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 # System Call
 
-[![Build Status](https://travis-ci.org/tlux/systemcall.svg?branch=master)](https://travis-ci.org/tlux/systemcall) 
+[![Build Status](https://travis-ci.org/tlux/systemcall.svg?branch=master)](https://travis-ci.org/tlux/systemcall)
+[![Coverage Status](https://coveralls.io/repos/github/tlux/systemcall/badge.svg?branch=master)](https://coveralls.io/github/tlux/systemcall?branch=master)
 [![Gem Version](https://badge.fury.io/rb/systemcall.svg)](https://badge.fury.io/rb/systemcall)
 
 A simple wrapper around Ruby's Open3 to call CLI programs and process their
 output.
 