In the current doc, the command examples are like
"os server create" but the acutal command should
be started with "openstack" instead of "os", it
is misleading to first time users.
Change-Id: Ic7686257725e1aa8e4e0d65a712eff1c079927a8
Add missing 'command' and 'configuration' object into
command object list, add command, module, host commands
describe in command-objects, and add 'mask' and 'unmask'
options in configuration command details, fix some format
issues by the way.
Change-Id: Iea80c7b1e413e02e49b9090b9d3cb9c59aab4c38
