Neuroevolution (NEAT)

Extend/modify the Toy Neural Network library to include [Neuroevolution of Augmenting Topologies](https://en.m.wikipedia.org/wiki/Neuroevolution_of_augmenting_topologies) (NEAT) and use it in the Flappy Bird game (Coding Challenge 100) or some other game.

Here's the original 2002 paper [Evolving Neural Networks through Augmenting Topologies (pdf)](https://www.google.com/url?sa=t&source=web&rct=j&url=http://nn.cs.utexas.edu/downloads/papers/stanley.ec02.pdf&ved=2ahUKEwj-m4-LqNvkAhWi16YKHU5GC9kQFjAQegQIAxAB&usg=AOvVaw0LTSukexmVEUSoZCpjZ9MW&cshid=1568842332942) by Kenneth O. Stanley & Risto Miikkulainen.