Fix license PanTools
We noticed that the current license text in PanTools ended with some text that should not be part of the license. In this merge request, I move that text to the README and unify the statement with that of the documentation.
We noticed that the current license text in PanTools ended with some text that should not be part of the license. In this merge request, I move that text to the README and unify the statement with that of the documentation.