Consider Un-licensing

[Daniel-Mietchen]

as per
https://unlicense.org/

[Daniel-Mietchen]

Licensing should be mentioned in the pull request template (cf. #943 ) and would involve a Contributor License Agreement workflow (cf. #962 )

[egonw]

Personally, I'd be fine with contributions under the same license... unlicensing sounds an overkill. In fact, having contributions with the same open license reduces the chance that any of our universities decides to change the license to proprietary, and may better protect the open nature of Scholia than public domain.

[fnielsen]

Pull request template and CLA are fine