Add comments to generate code to fix #122 (#127)

Author: stilvoid

python/rpdk/go/templates/main.go.tple

@@ -15,10 +15,12 @@ This file is autogenerated, do not edit;
 changes will be undone by the next 'cfn generate' command.
 */
 
+// Handler is a container for the CRUDL actions exported by resources
 type Handler struct{}
 
 {% for method in ("Create", "Read", "Update", "Delete", "List") %}
 
+// {{ method }} wraps the related {{ method }} function exposed by the resource code
 func (r *Handler) {{ method }}(req handler.Request) handler.ProgressEvent {
 	return wrap(req, resource.{{ method }})
 }