Port new CI

I'm about to submit something and some work is necessary in this package.

Follow below a small list that I'll tackle in the next few days. Fell free to add stuff.

• Port to the new CI
• Remove legacy code (trainers, data shufflers, layers that are already part of TF, analysers, initialization, some losses)
• Sphinx document it (there's nothing w.r.t the new stuff)
• Make it public
• Publish it in our channel
• Nightlies

• Update the readme based on templates
• Add it to bob/docs and bob/bob