squash! Docker: Add documentation

*  Sphinx based documentation, available on
   http://docker-autotest.readthedocs.org/en/latest/index.html
*  Makefile to build local html copy of documentation using
   sphinx-build.

Signed-off-by: Chris Evich <cevich@redhat.com>
squash! Docker: Add documentation

*  Added check before each test that documentation
   and API api versions match.  Subtest modules
   already verify configuration and API versions
   match.

Signed-off-by: Chris Evich <cevich@redhat.com>
fixup! Docker: Add documentation

Signed-off-by: Chris Evich <cevich@redhat.com>