Merge pull request realpython#389 from willingc/doc-263

Created top level how to contribute doc as suggested in Issue: 263

Author: sigmavirus24

CONTRIBUTING.md

@@ -0,0 +1,15 @@
+How to contribute
+-----------------
+
+This guide is under heavy development. If you would like to contribute, please
+see:
+
+http://docs.python-guide.org/en/latest/notes/contribute/
+
+
+Style Guide
+-----------
+
+For all contributions, please follow the `Guide Stye Guide`:
+
+http://docs.python-guide.org/en/latest/notes/styleguide/