- added GPLv2+ license statement

README

@@ -21,10 +21,15 @@ Requirements:
  - maven 2 
  - java 6
 
+See INSTALL for further information on how to build this plugin.
 
 License
 =======
-http://www.gnu.org/licenses/gpl-2.0.html
+LaTeXMath Freemind Plugin is licensed under GNU General Public License
+as published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version. For details, see
+http://www.gnu.org/licenses/gpl-2.0.html.
+
 
 BUGS
 ====