Identity v3 Projects Delete (#166)

diff --git a/openstack/identity/v3/projects/urls.go b/openstack/identity/v3/projects/urls.go
index 7be9dc2..c9f0d58 100644
--- a/openstack/identity/v3/projects/urls.go
+++ b/openstack/identity/v3/projects/urls.go
@@ -13,3 +13,7 @@
 func createURL(client *gophercloud.ServiceClient) string {
 	return client.ServiceURL("projects")
 }
+
+func deleteURL(client *gophercloud.ServiceClient, projectID string) string {
+	return client.ServiceURL("projects", projectID)
+}