Updated outdated link to module directory.

Core modules link updated and Extras link added.

docsite/rst/common_return_values.rst

@@ -40,8 +40,10 @@ a stdout in the results it will append a stdout_lines which is just a list or th
 
    :doc:`modules`
        Learn about available modules
-   `GitHub modules directory <https://github.com/ansible/ansible/tree/devel/library>`_
+   `GitHub Core modules directory <https://github.com/ansible/ansible-modules-core/tree/devel>`_
        Browse source of core modules
+   `Github Extras modules directory <https://github.com/ansible/ansible-modules-extras/tree/devel>`_
+       Browse source of extras modules.
    `Mailing List <http://groups.google.com/group/ansible-devel>`_
        Development mailing list
    `irc.freenode.net <http://irc.freenode.net>`_

docsite/rst/developing_modules.rst

@@ -474,8 +474,10 @@ This example allows the stat module to be called with fileinfo, making the follo
        Learn about developing plugins
    :doc:`developing_api`
        Learn about the Python API for playbook and task execution
-   `GitHub modules directory <https://github.com/ansible/ansible/tree/devel/library>`_
+   `GitHub Core modules directory <https://github.com/ansible/ansible-modules-core/tree/devel>`_
        Browse source of core modules
+   `Github Extras modules directory <https://github.com/ansible/ansible-modules-extras/tree/devel>`_
+       Browse source of extras modules.
    `Mailing List <http://groups.google.com/group/ansible-devel>`_
        Development mailing list
    `irc.freenode.net <http://irc.freenode.net>`_