On the license and authors/contributors

[nbro]

If I understand correctly, once someone contributes to a software project under the GPLv3 license, he/she is officially part of the authors and copyright can start to be affiliated with him/her, but I'm not fully sure about this, to be honest.

In any case, I suggest that

there should be a file called e.g. CONTRIBUTORS.md (or AUTHORS.md) in the root folder that lists all main contributors (and what their contributors are). Why? Because I've noticed that some modules are only associated with certain contributors and authors, so there's a lot of inconsistency about the doc-strings at the top of each module. I suggest that we should have a single doc-string for each module, something similar to this, and maybe say "Copyright PonyGE2 Team", then link to the file that contains the list of main contributors.

Of course, needless to say, I want to be part of this team, given that I'm interested in GE and, in particular, this library. Meanwhile, I've already proposed a pull request here with some improvements to the project. More improvements will come, if you agree to make me part of the team of authors.

[jmmcd]

I'm in favour of CONTRIBUTORS.md. We won't need a detailed list of individual contributions as it would be impractical to keep it up to date. Yes, it would then be better to remove author attributions in each .py file's docstring.

[jmmcd]

Added CONTRIBUTORS.md. Needs formatting.

Still need to clean up author attribution throughout.