As "GoldenCrow" states at the github issue from your link, it appears one can obtain a license at http://www.turnjs.com/get
(Wherever this link comes from, anyway. It seems it isn't on the main page itself, which is weird.)
This whole licensing mess and misunderstanding is preventing me from using this library now, which is sad, because it seems it's actually pretty good at doing its job.
This whole licensing mess and misunderstanding is preventing me from using this library now, which is sad, because it seems it's actually pretty good at doing its job.