Show team and repo badges on README

This patch adds the team's and repository's badges to the README file.
The motivation behind this is to communicate the project status and
features at first glance.

For more information about this effort, please read this email thread:

http://lists.openstack.org/pipermail/openstack-dev/2016-October/105562.html

To see an example of how this would look like check:

b'https://gist.github.com/cff28059637f37993802631cb30976d1\n'

Closes-Bug: #1696631
Change-Id: I024f7fb9f72bf05dacbf9b43323eb3c29206894a
diff --git a/README.rst b/README.rst
index 51940d7..956d660 100644
--- a/README.rst
+++ b/README.rst
@@ -1,6 +1,15 @@
-========
-Overview
-========
+========================
+Team and repository tags
+========================
+
+.. image:: http://governance.openstack.org/badges/patrole.svg
+    :target: http://governance.openstack.org/reference/tags/index.html
+
+..
+
+=========================================
+Patrole - RBAC Integration Tempest Plugin
+=========================================
 
 Patrole is a tool for verifying that Role-Based Access Control is being
 correctly enforced.