Add Magento Copyright

Author: dshevtsov

COPYING.txt

@@ -0,0 +1,9 @@
+Copyright © 2013-present Magento, Inc.
+
+Each Magento source file included in this distribution is licensed under OSL 3.0 or the Magento Enterprise Edition (MEE) license
+
+http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
+Please see LICENSE.txt for the full text of the OSL 3.0 license or contact [email protected] for a copy.
+
+Subject to Licensee's payment of fees and compliance with the terms and conditions of the MEE License, the MEE License supersedes the OSL 3.0 license for each source file.
+Please see LICENSE_EE.txt for the full text of the MEE License or visit http://magento.com/legal/terms/enterprise.