Add CONTRIBUTING.md file

CONTRIBUTING.md

@@ -0,0 +1,19 @@
+# Contributing to Hound
+We welcome (and appreciate) contributions from the community! Give this guide a quick read to ensure your contribution 
+goes as smoothly as possible.
+
+## Submitting contributions
+If you're just getting started, this guide will help get you started 
+[hacking on hound](https://github.com/hound-search/hound#hacking-on-hound).
+
+Once you're ready, open a [pull request](https://github.com/hound-search/hound/compare) with a clear description of 
+your changes (you can read more about pull requests on GitHub [here](http://help.github.com/pull-requests/)).
+
+When you send a pull request, please be sure to include: 
+- unit tests that validate that your changes work as expected
+- consice code comments (it can help to imagine that you're explaining your code to a total stranger)
+- an examples, if necessary.
+
+## More
+Hound is a volunteer effort. We do our best to try and review contributions in a timely manner. Any code or feedback 
+you share with us is hugely appreciated.