Devref: Options with Choices
Devref: Options with Choices

Add a developer reference for options with choices. This patch set
also includes RST doc formatting fixes.

Change-Id: I5fd6a699806edf1d2d95110f0b8a2b8a385028ab

dtroyer/python-openstackclient,dtroyer/python-openstackclient,redhat-openstack/python-openstackclient,openstack/python-openstackclient,openstack/python-openstackclient,redhat-openstack/python-openstackclient