Fix #361: files licensed under GPL

pymoo/vendor/hv.py

@@ -1,19 +1,7 @@
 #    Copyright (C) 2010 Simon Wessing
 #    TU Dortmund University
-#
-#    This program is free software: you can redistribute it and/or modify
-#    it under the terms of the GNU General Public License as published by
-#    the Free Software Foundation, either version 3 of the License, or
-#    (at your option) any later version.
-#
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU General Public License for more details.
-#
-#    You should have received a copy of the GNU General Public License
-#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
+#    The author (Simon Wessing) has explicitly given the permission for this source code
+#    to be included in pymoo. Thank you!
 
 __author__ = "Simon Wessing"