This PR contains the work done to addres the issue #8, related to setting up a EUPL 1.2 license for this project. To provide further details about the work done: - [x] defined the LICENSE text; - [x] defined the CONTRIBUTORS text; - [x] added a header file to source code available in this project. Co-authored-by: Javier Cicchelli <javier@rock-n-code.com> Reviewed-on: #12