Glance keystone region support added

Change-Id: I23186591204e157389a02850fcf27b0d79d08753
diff --git a/README.rst b/README.rst
index a1cfa52..32fbf92 100644
--- a/README.rst
+++ b/README.rst
@@ -68,6 +68,22 @@
           source: http://cdn.download.cirros-cloud.net/0.3.1/cirros-0.3.1-x86_64-disk.img
           public: true
 
+Keystone and cinder region
+============================
+
+.. code-block:: yaml
+
+    glance:
+      server:
+        enabled: true
+        version: kilo
+        ...
+        identity:
+          engine: keystone
+          host: 127.0.0.1
+          region: RegionTwo
+        ...
+
 Ceph integration glance
 =======================