message: [skip ci] New feature
diff: We are pleased to announce the release 3.8.0 of the GUDHI library.
  -As a major new feature, the GUDHI library now offers **...**
  +As a major new feature, the GUDHI library now offers Perslay, a Tensorflow model for the representations module.
  We are now using GitHub to develop the GUDHI library, do not hesitate to [fork the GUDHI project on GitHub](https://github.com/GUDHI/gudhi-devel). From a user point of view, we recommend to download GUDHI user version (gudhi.3.X.X.tar.gz).
  