CONTRIBUTING.md in capybara-webkit-1.5.2 vs CONTRIBUTING.md in capybara-webkit-1.6.0

@@ -1,5 +1,8 @@
-We love pull requests. Here's a quick guide:
+We love pull requests from everyone. We expect users to follow our
+[code of conduct] while submitting code or comments.
+
+[code of conduct]: https://thoughtbot.com/open-source-code-of-conduct
 
 ## Dependencies
 
 Some of the tests depend on the `identify` command that comes with Imagemagick.
 Imagemagick can be installed via [homebrew](http://mxcl.github.com/homebrew/) on