Deploy guides includes quickstart guide.
Includes respect relative paths, but when
quickstart includes vagrant doc, deploy-guide
tries to locate the doc in its doctree (deploy-guide/source).

This causes error 404 and deploy-guide post-gates to fail

Change-Id: I05e49bbcef564ad4f3d80f0649ccf191d9f8b59d

Currently the project-deploy-guide links to the entire dev
doc repo for Kolla-Ansible. This is incorrect. It should link
only to installation information that can be found in the quick
start guide. This patch remedies that change, and ensures that
there is a link to the kolla deploy guide published at
docs.o.o.

Change-Id: I43738e341e996cb5a589a09c4c59c0dc8b058458

This builds the deployment guide that will be published to
https://docs.openstack.org/project-deploy-guide/newton/.

In this approach, all existing documents in kolla-ansible/doc directory
will remain. The kolla-ansible/deploy-guide directory will simply
include all documents that exist in the kolla-ansible/doc directory.
All new changes will be made to the documents in the docs directory
which will be imported to the deployment-guide. However, I believe we
will also have to build the deployment-guide every time a change is
merged to the docs in the doc directory.

Change-Id: I98db4ec45403cf48086381b45bf5a12bbf998911