Updated openstack/openstack
Project: openstack/python-swiftclient  6b836ac3686d6842bf50ac24f09aca8dfac3f41b

Update theme for docs

The current developer docs theme used is out of sync with the other
openstack projects. This patch will update the docs to provide a more
consistent look and feel when using developer docs

Change-Id: I2c66f60f6cfdd7b7b50a457c931f11851f668fa6