Added links to official Python Docs and Read the Docs

Author: Johannes Seitz

docs/intro/resources.rst

@@ -1,3 +1,23 @@
+Documentation
+=============
+
+Official Documentation
+~~~~~~~~~~~~~~~~~~~~~~
+
+The official Python Language and Library documentation can be found here:
+
+- `Python 2.x <http://docs.python.org/>`_
+- `Python 3.x <http://docs.python.org/py3k/>`_
+
+
+Read the Docs
+~~~~~~~~~~~~~
+
+Read the Docs is a popular community project, providing a single location for all documentation of popular and even more exotic Python modules.
+
+`Read the Docs <http://readthedocs.org/>`_
+
+
 Resources
 =========