Add Argonne copyright statement.

Add Argonne copyright statement. Also replace ACME with E3SM

LICENSE.TXT

@@ -4,12 +4,15 @@ All rights reserved.
 Copyright (c) 2017, Sandia Corporation. 
 Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
 the U.S. Government retains certain rights in this software.
+  and
+Copyright (c) 2017, UChicago Argonne, LLC, All Rights Reserved 
+under Contract No. DE-AC02-06CH11357 with the Department of Energy
 
 Developed by:
               University Corporation for Atmospheric Research - National Center for Atmospheric Research
               https://www2.cesm.ucar.edu/working-groups/sewg
                 and
-              DOE BER ACME project team members, including those at SNL and ANL
+              DOE BER E3SM project team members, including those at SNL and ANL
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the "Software"),