Release 3.0

[mirkobronzi]

• Switched from the cookiecutter syntax to "pure" python. this does not change much for the final cookiecutter user, but it will simplify greatly the process of adding feature/bug fixing of the developers working on the cookiecutter itself.
• Toy experiment changed to fashion mnist, in order to have a classification task instead of a regression one (as it was before).
• Evaluation script was rewritten and how it's separated from the training script.
• Add pytype to Continuous Integration.