Update copyright dates in a couple of places.

LICENSE

@@ -1,6 +1,6 @@
-"iperf, Copyright (c) 2014, 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."
+"iperf, Copyright (c) 2014-2016, 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."
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

README.md

@@ -194,7 +194,7 @@ responsibility for the content of these pages.
 Copyright
 ---------
 
-iperf, Copyright (c) 2014, 2015, The Regents of the University of
+iperf, Copyright (c) 2014-2016, 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.