Identity v3 Projects Get (#164)

* Identity v3 Projects Get

* Renaming ToGetQuery to ToProjectGetQuery

* Fixing acceptance test
diff --git a/openstack/identity/v3/projects/urls.go b/openstack/identity/v3/projects/urls.go
index e80a395..5effbfb 100644
--- a/openstack/identity/v3/projects/urls.go
+++ b/openstack/identity/v3/projects/urls.go
@@ -5,3 +5,7 @@
 func listURL(client *gophercloud.ServiceClient) string {
 	return client.ServiceURL("projects")
 }
+
+func getURL(client *gophercloud.ServiceClient, projectID string) string {
+	return client.ServiceURL("projects", projectID)
+}