Add swift support.

Based on github.sh/cloudbuilders/deploy.sh/swift. This is a WIP branch.
diff --git a/stackrc b/stackrc
index 9b110a3..e880c17 100644
--- a/stackrc
+++ b/stackrc
@@ -2,6 +2,10 @@
 NOVA_REPO=https://github.com/cloudbuilders/nova.git
 NOVA_BRANCH=diablo
 
+# storage service
+SWIFT_REPO=https://github.com/openstack/swift.git
+SWIFT_BRANCH=diablo
+
 # image catalog service
 GLANCE_REPO=https://github.com/cloudbuilders/glance.git
 GLANCE_BRANCH=diablo