Fix License

#7

Author: simonebortolin

README.md

@@ -90,12 +90,13 @@ I thank all the authors of the various commits that I have included in my fork
 ## License
 
     Copyright 2016 Xiaofeng Han
+    Copyright 2018-2020 Simone Bortolin
 
-    Licensed under the Apache License, Version 2.0 (the "License");
+    Licensed under the GNU GENERAL PUBLIC LICENSE (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
 
-       http://www.apache.org/licenses/LICENSE-2.0
+       https://github.com/simonebortolin/FlowLayoutManager/blob/master/LICENSE
 
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,