This patch implements:
- The OpenStack Manuals documentation theme.
- Some minor content changes to the index pages to ensure
that they render correctly.
- Adjustments to the tox/requirements configuration in order
to implement doc8 checks to facilitate improved documentation
checking for incoming patches.
- Adjustments to the sphinx configuration for easier
maintenance.
Note:
The bug_title in the openstackdocstheme is not currently
customisable. A patch to implement the ability to do so
has been submitted: https://review.openstack.org/338299
Partially-Implements: blueprint osa-install-guide-overhaul
Change-Id: I8af1a7ce9008e70abad00be96614c9997f59596b