ReNo [1] is the release management tool in OpenStack.
This patch adds the basic structure to start using it for doc
builds in puppet-tripleo.
* Update .gitignore
* Add a basic note "use-reno"
* Add releasenotes/ dir and basic files
* Add python files: setup.cfg, setup.py, test-requirements.txt and
tox.ini.
[1] http://docs.openstack.org/developer/reno
Change-Id: Idc9a30ab632c8e2ca794fb10431cdefd5d861d14