Update README.md

Author: mac-s-g

README.md

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 ![alt text](https://github.com/mac-s-g/react-json-view/blob/master/doc/rjv-icon-alt.png?raw=true)
 
-[![npm](https://img.shields.io/npm/v/react-json-view.svg)](https://www.npmjs.com/package/react-json-view) [![npm](https://img.shields.io/npm/l/react-json-view.svg)](https://www.npmjs.com/package/react-json-view)
+[![npm](https://img.shields.io/npm/v/react-json-view.svg)](https://www.npmjs.com/package/react-json-view) [![npm](https://img.shields.io/npm/l/react-json-view.svg)](https://www.npmjs.com/package/react-json-view) [![Build Status](https://travis-ci.org/mac-s-g/react-json-view.svg)](https://travis-ci.org/mac-s-g/react-json-view)
 
 # react-json-view
 Interactive react component for displaying javascript **arrays** and **JSON objects**.