Added link to snippets website to the patterns docs.

docs/patterns/index.rst

@@ -10,6 +10,9 @@ changes are they will open a database connection at the beginning of the
 request and get the information of the currently logged in user.  At the
 end of the request, the database connection is closed again.
 
+There are more user contributed snippets and patterns in the `Flask
+Snippet Archives <http://flask.pocoo.org/snippets/>`_.
+
 .. toctree::
    :maxdepth: 2