update year; reduce duplicate of lincese and Help; update About layout

BlackBox/LICENSE.txt

@@ -1,5 +1,5 @@
-Copyright (c) 2017 - 2019 Alexander V. Shiryaev, Ivan A. Denisov, Igor A. Dehtyarenko, Anton A. Dmitriev
-Copyright (c) 2013 - 2017 BlackBox Framework Center
+Copyright (c) 2017 - 2020 Alexander V. Shiryaev, Ivan A. Denisov, Igor A. Dehtyarenko, Anton A. Dmitriev
+Copyright (c) 2013 - 2019 BlackBox Framework Center
 Copyright (c) 1994 - 2013 Oberon microsystems, Inc., Switzerland. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: