Update error messages and copyright dates

LICENSE

-Copyright (c) 2005-2016, The JastAdd Team
+Copyright (c) 2005-2020, The JastAdd Team
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without

README.md

@@ -8,7 +8,7 @@ For additional contributors, see the change logs.
 
 ## License
 
-Copyright (c) 2005-2016, The JastAdd Team. All rights reserved.
+Copyright (c) 2005-2020, The JastAdd Team. All rights reserved.
 
 JastAdd2 is covered by the modified BSD License. For the full license text
 see the LICENSE file.

src/java/org/jastadd/JastAdd.java

@@ -139,7 +139,7 @@ public class JastAdd {
     if (config.shouldPrintVersion()) {
       out.println(getVersionString());
       out.println(getBuildTimestamp());
-      out.println("Copyright (c) 2005-2015, The JastAdd Team. All rights reserved.");
+      out.println("Copyright (c) 2005-2020, The JastAdd Team. All rights reserved.");
       out.println("This software is covered by the modified BSD license.");
       return 0;
     } else if (config.shouldPrintHelp()) {