adding LICENSE.md

README.md

@@ -76,4 +76,4 @@ This program is distributed in the hope that it will be useful, but WITHOUT ANY
 
 You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-The detailed terms of the license are available in the ```LICENSE.txt``` file in the repository.
+The detailed terms of the license are available in the ```LICENSE.md``` file in the repository.