Export trained model to keras/tf

[martinjm97]

[martinjm97]

This will likely involve generating copatible json.

[sgrosser]

I think all we need to do is save the model and then provide skeleton code for loading it

[martinjm97]

I don't think we need to provide skeleton code, but otherwise it's annoying.

[sgrosser]

True, we can just export the saved model files