add licence

README.md

 # Tutorials GenX
 
-Here you will find small tutorials on how to use GenX (https://aglavic.github.io/genx/index.html).
+Here you will find small tutorials on how to use GenX (https://aglavic.github.io/genx/index.html) with data obtained on SIRIUS (Synchrotron SOLEIL).
+
+# Disclaimer
+
+    Copyright (C) 2024  HEMMERLE Arnaud
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero 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 Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 ## howto_batch
 The notebook ```batch_genx.ipynb``` details the different steps on how to use GenX with command lines.