This program is free software: you can redistribute it and/or modify 
it under the terms of the Creative Commons Attribution-ShareAlike 4.0 
International (CC BY-SA 4.0)

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
CC BY-SA 4.0 License for more details.

You should have received a copy of the CC BY-SA 4.0 License along with
this program.  If not, see <http://creativecommons.org/licenses/by-sa/4.0/>.