Identity v3 Projects Update (#167)

diff --git a/openstack/identity/v3/projects/results.go b/openstack/identity/v3/projects/results.go
index 5a29657..a441e7f 100644
--- a/openstack/identity/v3/projects/results.go
+++ b/openstack/identity/v3/projects/results.go
@@ -24,6 +24,11 @@
 	gophercloud.ErrResult
 }
 
+// UpdateResult temporarily contains the response from the Update call.
+type UpdateResult struct {
+	projectResult
+}
+
 // Project is a base unit of ownership.
 type Project struct {
 	// IsDomain indicates whether the project is a domain.