Added a config file for documentation generation using Markdown and readthedocs.org.
Added a config file for documentation generation using Markdown and readthedocs.org.

Config file docs are located at http://www.mkdocs.org/user-guide/configuration.

Change-Id: I0ecdbe8166a00547c1135d28a4f2be32810afe71

sapcc/monasca-thresh,openstack/monasca-thresh,openstack/monasca-thresh,stackforge/monasca-thresh,openstack/monasca-thresh,stackforge/monasca-thresh,sapcc/monasca-thresh