Initial sphynx doc setup for publishing

Convert existing documentation into RST format so
that it can be included in published format
at http://docs.openstack.org/infra/

The doc/source files are autogenerated using sphinx-quickstart
except doc/source/third_party_ci.rst which is the rst version of
contrib/README.md autogenerated using pandoc.

A few modifications were made per reviewer comments to improve
the clarity and grammar. In addition, relative paths were updated
to absolute paths so that they are correct for both the .md
and .rst file locations.

Change-Id: I336fe7d23b920f60a59e657f10ec5781fa5510f5

setup.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+# Copyright (c) 2015 Hewlett-Packard Development Company, L.P.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import setuptools
+
+setuptools.setup(
+    setup_requires=['pbr'],
+    pbr=True)