Add Rackspace Auto Scale client
diff --git a/rackspace/client.go b/rackspace/client.go
index a8f413e..09e9006 100644
--- a/rackspace/client.go
+++ b/rackspace/client.go
@@ -222,3 +222,13 @@
 	}
 	return &gophercloud.ServiceClient{ProviderClient: client, Endpoint: url}, nil
 }
+
+// NewAutoScaleV1 creates a ServiceClient that may be used to access the v1 Auto Scale service.
+func NewAutoScaleV1(client *gophercloud.ProviderClient, eo gophercloud.EndpointOpts) (*gophercloud.ServiceClient, error) {
+	eo.ApplyDefaults("rax:autoscale")
+	url, err := client.EndpointLocator(eo)
+	if err != nil {
+		return nil, err
+	}
+	return &gophercloud.ServiceClient{ProviderClient: client, Endpoint: url}, nil
+}