Adding doc.go files for packages
diff --git a/openstack/blockstorage/v1/apiversions/doc.go b/openstack/blockstorage/v1/apiversions/doc.go
index c3c486f..e3af39f 100644
--- a/openstack/blockstorage/v1/apiversions/doc.go
+++ b/openstack/blockstorage/v1/apiversions/doc.go
@@ -1,3 +1,3 @@
// Package apiversions provides information and interaction with the different
-// API versions for the OpenStack Cinder service.
+// API versions for the OpenStack Block Storage service, code-named Cinder.
package apiversions