Update badges in README.md

Author: MaXFalstein

README.md

@@ -1,9 +1,16 @@
 # Parallel.js
 
+[![Throughput Graph](https://graphs.waffle.io/parallel-js/parallel.js/throughput.svg)](https://waffle.io/parallel-js/parallel.js/metrics/throughput)
+
 [![Build Status](https://travis-ci.org/parallel-js/parallel.js.svg?branch=master)](https://travis-ci.org/parallel-js/parallel.js)
 [![NPM version](https://badge.fury.io/js/paralleljs.svg)](http://badge.fury.io/js/paralleljs)
 [![Dependency Status](https://img.shields.io/david/parallel-js/parallel.js.svg)](https://david-dm.org/parallel-js/parallel.js)
-[![npm](https://img.shields.io/npm/dm/paralleljs.svg?maxAge=2592000)]()
+[![npm](https://img.shields.io/npm/dm/paralleljs.svg?maxAge=2592000)](https://www.npmjs.com/package/paralleljs)
+[![Known Vulnerabilities](https://snyk.io/test/github/parallel-js/paralle.js/badge.svg)](https://snyk.io/test/github/parallel-js/paralle.js)
+[![Pull Requests Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat)](http://makeapullrequest.com)
+[![first-timers-only Friendly](https://img.shields.io/badge/first--timers--only-friendly-blue.svg)](http://www.firsttimersonly.com/)
+[![Join the chat at on Gitter.im](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/parallel-js/parallel.js)
+
 [![first-timers-only](http://img.shields.io/badge/first--timers--only-friendly-blue.svg?style=flat-square)](http://www.firsttimersonly.com/)
 
 **Easy Parallel Computing with Javascript**