Updated openstack/openstack
Project: openstack/python-openstackclient  cd870886fc20d531a2c3ddc9cfb0d8808fc5c375
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Update docs for plugins and release notes

* Fill out the existing command and man page
* Add a plugins page.
* Begin the release notes for 0.3.0

Change-Id: I4527fed28a10a9d79fc8f6c1d925a4bf0d0a7a36