Readme: Add codefactor badge

README.md

@@ -13,6 +13,7 @@
 [![Build Status](https://travis-ci.org/zurutech/ashpy.svg?branch=master)](https://travis-ci.org/zurutech/ashpy)
 [![Documentation Status](https://readthedocs.org/projects/ashpy/badge/?version=latest)](https://ashpy.readthedocs.io/en/latest/?badge=latest)
 [![Black - Badge](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/python/black)
+[![CodeFactor](https://www.codefactor.io/repository/github/zurutech/ashpy/badge)](https://www.codefactor.io/repository/github/zurutech/ashpy)
 
 AshPy is a TensorFlow 2.0 library for (**distributed**) training, evaluation, model selection, and fast prototyping.
 It is designed to ease the burden of setting up all the nuances of the architectures built to train complex custom deep learning models.