1. Normalizing flows - theory and implementation - 1D flows

This is an introduction to the theory behind normalizing flows and how to implement for a simple 1D case. The code is available here: https://github.com/TinyVolt/normalizi... The content is largely taken from the excellent course "Deep Unsupervised Learning" by UCB. The original repo is here: https://github.com/rll/deepul/tree/ma... All I did was rewrite the code in a cleaner and (slightly) more efficient manner.