Add PDF building

This commit add PDF building tox.ini environment and options for LaTeX
output. overview.rst is copied from README.rst. And, the original
README.rst file is shrunk because we don't need such a long information
in the README file. People can see the same contents in overview.rst
now.

Change-Id: Id654c814988e78704726d2ba8bea9a03ce8596f8
diff --git a/doc/source/conf.py b/doc/source/conf.py
index c2ea628..e6fb8fd 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -52,6 +52,7 @@
 extensions = ['sphinx.ext.autodoc',
               'sphinx.ext.todo',
               'sphinx.ext.viewcode',
+              'sphinxcontrib.rsvgconverter',
               'openstackdocstheme',
               'oslo_config.sphinxconfiggen',
              ]
@@ -196,3 +197,16 @@
 
 # A list of warning types to suppress arbitrary warning messages.
 suppress_warnings = ['image.nonlocal_uri']
+
+# -- Options for LaTeX output -------------------------------------------------
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title, author, documentclass
+# [howto/manual]).
+latex_documents = [
+    ('index', 'doc-tempest.tex', u'Tempest Testing Project',
+     u'OpenStack Foundation', 'manual'),
+]
+
+# Disable usage of xindy https://bugzilla.redhat.com/show_bug.cgi?id=1643664
+latex_use_xindy = False