Update contributing link in README

README.rst

@@ -25,17 +25,14 @@ Community
 * Developer IRC channel: `#ckan on irc.freenode.net <http://webchat.freenode.net/?channels=ckan>`_
 * `Issue tracker <https://github.com/okfn/ckan/issues>`_
 * `CKAN tag on StackOverflow <http://stackoverflow.com/questions/tagged/ckan>`_
+* `Wiki <https://github.com/okfn/ckan/wiki>`_
 
 
 Contributing to CKAN
 --------------------
 
-CKAN is a free software project and code contributions are welcome.
-The `For CKAN Developers <http://docs.ckan.org/en/latest/index.html#for-ckan-developers>`_
-section of the documentation explains how to contribute to CKAN or its documentation,
-including our **coding standards**.
-
-The `CKAN Wiki <https://github.com/okfn/ckan/wiki>`_ is also open fo contributions.
+For contributing to CKAN or its documentation, see
+`CONTRIBUTING <https://github.com/okfn/ckan/blob/master/CONTRIBUTING.rst>`_.
 
 
 Copying and License