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: I80c96f0938cec382f2f714a500138bd5a2c81aa0
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
