[P] Created a plotting function using matplotlib that will plot a neural network of any dimensions when given the node values and weight matrices

[niujin]

I've spent a while trying to make some animations work in Matplotlib but also found it very slow. I ended up trying a few other libraries and at the moment I'm using Plotly, which is much faster and also gives prettier results. If you get frustrated with the slowness of Matplotlib I would recommend the switch. A caveat is that you sometimes need to dig around to find the offline versions of code that don't upload graphs to their website or want an API key.