add contributing setup

contributing.md

@@ -1,5 +1,13 @@
 # Contribution Guidelines
 
+## Setup for Contributing
+
+- Make sure you are running [node.js >= v6](https://nodejs.org/en/).
+- Make sure you have an [editorconfig plugin](http://editorconfig.org/#download) installed for your text editor
+- Make sure you have a [standard js linter](http://standardjs.com/index.html#usage) installed, tests will not pass if linting fails
+- Make sure you are familiar with [ES6](https://medium.com/sons-of-javascript/javascript-an-introduction-to-es6-1819d0d89a0f)
+- Make sure you are familiar with [test-driven development](https://www.wikiwand.com/en/Test-driven_development)
+
 ## Linting & Code Style
 
 > **NOTE:** This project uses [Standard.js](/feross/standard) to check for code consistency.