docs(COPYRIGHT.txt): Added Copyright notice to copyright file.

COPYRIGHT.txt

@@ -0,0 +1,17 @@
+*** Copyright Notice ***
+
+inference-engine Copyright (c) 2022, The Regents of the University of
+California, through Lawrence Berkeley National Laboratory (subject to
+receipt of any required approvals from the U.S. Dept. of Energy). 
+All rights reserved.
+
+If you have questions about your rights to use or distribute this software,
+please contact Berkeley Lab's Intellectual Property Office at
+[email protected].
+
+NOTICE.  This Software was developed under funding from the U.S. Department
+of Energy and the U.S. Government consequently retains certain rights.  As
+such, the U.S. Government has been granted for itself and others acting on
+its behalf a paid-up, nonexclusive, irrevocable, worldwide license in the
+Software to reproduce, distribute copies to the public, prepare derivative 
+works, and perform publicly and display publicly, and to permit others to do so.