forgetting with 1 neuron not listed in readme

vlomonaco

vlomonaco

also "permuted_and_split_mnist.ipynb" should be added to the list. This is a modified version of the intro to cl for the [cl course](https://course.continualai.org/).

kwcooper

will be fixed with #29 Also, not sure how I lost write access to the repo... so you'll have to merge it 😓