add documentation for move func, add rename function as a wrapper for move

storage.go

@@ -274,6 +274,14 @@ func (s *Storage) Copy(name string, dest string) error {
 	}
 }
 
+// Rename is a wrapper over the Move function.
+func (s *Storage) Rename(name, dest string) error {
+	return s.Move(name, dest)
+}
+
+// Move moves a file from one place to another.
+// It takes a file name, and the destination name as its parameter.
+// The function returns an error, if any.
 func (s *Storage) Move(name string, dest string) error {
 	if s.s3Client != nil {
 		if _, err := s.s3Client.CopyObject(s.ctx, minio.CopyDestOptions{