initial seed for tempest doc directory

This is a first bit of experiment to get a doc tree for tempest
that will publish our doc content to the web as part of a larger
QA doc guide.

Update some of the base READMEs to be a little more accurate,
now that we're going to be pushing them to the web.

Added tox [venv] to ensure that docs get built

Change-Id: Id54e8fbc1d884525087630106e17b37dc1206cc9
diff --git a/tox.ini b/tox.ini
index 066a2b5..d6c2c41 100644
--- a/tox.ini
+++ b/tox.ini
@@ -49,6 +49,11 @@
    nosetests --logging-format '%(asctime)-15s %(message)s' --with-xunit --xunit-file=nosetests-full.xml -sv tempest/api tempest/scenario tempest/thirdparty tempest/cli
    python -m tools/tempest_coverage -c report --html
 
+[testenv:venv]
+commands = {posargs}
+deps = -r{toxinidir}/tools/pip-requires
+       -r{toxinidir}/tools/test-requires
+
 [testenv:pep8]
 commands = flake8
 deps = -r{toxinidir}/tools/pip-requires