Update README.md

Author: NetBender

README.md

@@ -79,6 +79,19 @@ TLSAssistant exists thanks to the following open-source projects (from a to z):
 - [tlsfuzzer](https://github.com/tomato42/tlsfuzzer)
 - [TLS Extended_Master_Checker](https://github.com/Tripwire-VERT/TLS_Extended_Master_Checker)
 
+## Licence
+Copyright 2019, Fondazione Bruno Kessler
 
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
 
-Developed within [Security & Trust](https://st.fbk.eu) Research Unit at [Fondazione Bruno Kessler](https://www.fbk.eu/en/) (Italy)
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+Developed within [Security & Trust](https://st.fbk.eu) Research Unit at [Fondazione Bruno Kessler](https://www.fbk.eu/en/) (Italy)