adds contributions welcome badge to readme. see: https://github.com/d…

…wyl/repo-badges/#contributing- for moar!

README.md

@@ -7,7 +7,7 @@
 [![devDependency Status](https://david-dm.org/dwyl/learn-hapi/dev-status.svg)](https://david-dm.org/dwyl/learn-hapi#info=devDependencies)
 [![NPM Version][npm-image]][npm-url]
 
-# Learn Hapi
+# Learn Hapi [![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](https://github.com/dwyl/learn-hapi/issues)
 
 Happiness is learning how to use the [**Hapi.js**](http://hapijs.com/) (Node.js) web framework to
 _**build reliable/scalable apps faster**_.