Add contributing info to README

- Close mmistakes#357

README.md

@@ -47,15 +47,29 @@ For even more demo pages check the [posts archive][year-archive].
 
 ---
 
-### Credits
+## Contributing
 
-#### Icons + Demo Images:
+Having trouble working with the theme? Found a typo in the documentation? Interested in adding a feature or [fixing a bug](https://github.com/mmistakes/minimal-mistakes/issues)? Then by all means [submit an issue](https://github.com/mmistakes/minimal-mistakes/issues/new) or [pull request](https://help.github.com/articles/using-pull-requests/). If this is your first pull request, it may be helpful to read up on the [GitHub Flow](https://guides.github.com/introduction/flow/) first.
+
+Minimal Mistakes has been designed as a base for you to customize and fit your site's unique needs. Please keep this in mind when requesting features and/or submitting pull requests. If it's not something that most people will use, I probably won't consider it. When in doubt ask. 
+
+This goes for author sidebar links and "share button" additions -- I have no intention of merging in every possibly option, the essentials are there to get you started :smile:.
+
+### Pull Requests
+
+To help me out try to avoid creating pull requests on `master` and instead branch off of `develop`. It's much easier for me to test, merge, and roll them into new releases this way.
+
+---
+
+## Credits
+
+### Icons + Demo Images:
 
 - [The Noun Project](https://thenounproject.com) -- Garrett Knoll, Arthur Shlain, and [tracy tam](https://thenounproject.com/tracytam)
 - [Font Awesome](http://fortawesome.github.io/Font-Awesome/)
 - [Unsplash](https://unsplash.com/)
 
-#### Other:
+### Other:
 
 - [Jekyll](http://jekyllrb.com/)
 - [jQuery](http://jquery.com/)
@@ -69,6 +83,8 @@ For even more demo pages check the [posts archive][year-archive].
 
 ---
 
+## License
+
 The MIT License (MIT)
 
 Copyright (c) 2016 Michael Rose