fix README

README.md

@@ -96,6 +96,12 @@ There are several ways for visualizing the detector geometry and the simulated e
  4) look at the result w/ the CED event display, e.g.
 
     `ced2go -d ../example/gear_ILD_o1_v05_ORG.xml -t ../example/ced2go-template.xml simple_lcio_REC.slcio`
-
-
 
+## License and Copyright
+Copyright (C), lcgeo Authors
+
+lcgeo 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 long with this program.  If not, see <http://www.gnu.org/licenses/>.