Add Ceilometer to CLI Guide

[Stephen Gordon]

The CLI Guide currently contains some basic initial coverage of the Heat CLI, but not the Ceilometer CLI which will also be integrated in Havana. I would like to add this.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/49675

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/49675
Committed: http://github.com/openstack/openstack-manuals/commit/6dfd57faf762043e96ebfd13142eb0ace2258a6b
Submitter: Jenkins
Branch: master

commit 6dfd57faf762043e96ebfd13142eb0ace2258a6b
Author: Deepti Navale <email address hidden>
Date: Fri Oct 4 15:22:00 2013 +1000

    Included content for ceilometer CLI section in user guide

    Included section 'Metering' in the CLI chapter with some basic
    commands for listing alarms, meters, statistics etc. Also included
    the list of commands, optional arguments in the Appendix-Command
    Reference. Made minor updates according to review comments.
    Partial-Bug: #1201459

    Change-Id: I42b18fea1f8eec2df8d78cb1dd55f4cb03766feb