Update LICENSE.md

LICENSE.md

+**License Information for OpenVolumeMesh**
+
 OpenVolumeMesh is free software: you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as
 published by the Free Software Foundation, either version 3 of
 the License, or (at your option) any later version with the
 following exceptions:
+
 OpenVolumeMesh 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