swift as glance backend (#2)

* Add swift to mitaka glance configuration

* Revert "Add swift to mitaka glance configuration"

This reverts commit 4fdd899db23cdb9e26c158b74397ede79495a136.

* Added swift configuration to formula

* Update configuration with new variables and defaults

* Adding a swift test example with lots of configuration options.

* Add sample for swift in README

* remove empty else.

* Adding endif for if 'swift' in storage_engines.

* Update variable naming scheme to use swift.store instead of swift_store
diff --git a/README.rst b/README.rst
index eafd56a..2a2693f 100644
--- a/README.rst
+++ b/README.rst
@@ -138,6 +138,28 @@
           map_file: '/etc/pycadf/glance_api_audit_map.conf'
       ....
 
+Swift integration glance
+
+.. code-block:: yaml
+
+    glance:
+      server:
+        enabled: true
+        version: mitaka
+        storage:
+          engine: swift,http
+          swift:
+            store:
+              auth:
+                address: http://keystone.example.com:5000/v2.0
+                version: 2
+              endpoint_type: publicURL
+              container: glance
+              create_container_on_put: true
+              retry_get_count: 5
+              user: 2ec7966596504f59acc3a76b3b9d9291:glance-user
+              key: someRandomPassword
+
 
 Client role
 -----------