Add downloads badge to readme

Author: peternewnham

README.md

@@ -7,6 +7,7 @@ A utility for converting HTML strings into [React](https://facebook.github.io/re
 [![Travis branch](https://img.shields.io/travis/wrakky/react-html-parser/master.svg)](https://travis-ci.org/wrakky/react-html-parser)
 [![Coveralls](https://img.shields.io/coveralls/wrakky/react-html-parser.svg)](https://coveralls.io/github/wrakky/react-html-parser)
 [![npm](https://img.shields.io/npm/v/react-html-parser.svg)](https://www.npmjs.com/package/react-html-parser)
+[![Downloads](https://img.shields.io/npm/dw/react-html-parser.svg)](https://www.npmjs.com/package/react-html-parser)
 [![David](https://img.shields.io/david/wrakky/react-html-parser.svg)](https://david-dm.org/wrakky/react-html-parser)
 
 ## Install
@@ -124,4 +125,4 @@ function transform(node, index) {
 The library exposes the `htmlparser2` library it uses. This allows consumers
 to use it without having to add it as a separate dependency.
 
-See https://github.com/fb55/htmlparser2 for full details.
+See https://github.com/fb55/htmlparser2 for full details.