Added in instructions for contributing

Author: barryclark

README.md

@@ -109,3 +109,10 @@ You can use the [Quick Start](https://github.com/barryclark/jekyll-now#quick-sta
 - [David Furnes](https://github.com/dfurnes), [Jon Uy](https://github.com/jonuy), [Luke Patton](https://github.com/lkpttn) - Thanks for the design/code reviews.
 - [Bart Kiers](https://github.com/bkiers), [Florian Simon](https://github.com/vermluh), [Henry Stanley](https://github.com/henryaj), [Hun Jae Lee](https://github.com/hunjaelee), [Javier Cejudo](https://github.com/javiercejudo), [Peter Etelej](https://github.com/etelej), [Ben Abbott](https://github.com/jaminscript), [Ray Nicholus](https://github.com/rnicholus), [Erin Grand](https://github.com/eringrand), [Léo Colombaro](https://github.com/LeoColomb), [Dean Attali](https://github.com/daattali) - Thanks for your [fantastic contributions](https://github.com/barryclark/jekyll-now/commits/master) to the project!
 
+## Contributing
+
+Issues and Pull Requests are greatly appreciated. If you've never contributed to an open source project before I'm more than happy to walk you through how to create a pull request.
+
+You can start by [opening an issue](https://github.com/barryclark/jekyll-now/issues/new) describing the problem that you're looking to resolve and we'll go from there.
+
+I want to keep Jekyll Now as minimal as possible. Every line of code should be one that's useful to 90% of the people using it. Please bear that in mind when submitting feature requests. If it's not something that most people will use, it probably won't get merged. :guardsman: