Docs(badges): Added npm and GreenKeeper badges

[ci skip]

README.md

@@ -2,10 +2,12 @@
 
 Parse CSV file with format detection for [Node.js](https://nodejs.org/)
 
+[![npm](https://img.shields.io/npm/v/readcsv.svg?maxAge=3600)](https://github.com/fvdm/nodejs-readcsv/blob/master/CHANGELOG.md)
 [![Build Status](https://travis-ci.org/fvdm/nodejs-readcsv?branch=master)](https://travis-ci.org/fvdm/nodejs-readcsv)
 [![Coverage Status](https://coveralls.io/repos/github/fvdm/nodejs-readcsv/badge.svg?branch=master)](https://coveralls.io/github/fvdm/nodejs-readcsv?branch=master)
 [![bitHound Dependencies](https://www.bithound.io/github/fvdm/nodejs-readcsv/badges/dependencies.svg)](https://www.bithound.io/github/fvdm/nodejs-readcsv/develop/dependencies/npm)
 [![bitHound Code](https://www.bithound.io/github/fvdm/nodejs-readcsv/badges/code.svg)](https://www.bithound.io/github/fvdm/nodejs-readcsv)
+[![Greenkeeper badge](https://badges.greenkeeper.io/fvdm/nodejs-readcsv.svg)](https://greenkeeper.io/)
 
 
 ## Example