Improve README

[Daanielvb]

I think it would be good to give a better explanation on how to use the trainer. I am trying to load a pre-trained model that made us of this library and couldn't understand how to add this dependency to my project.

Is it compatible with python 3.7? Cuz the documentation and the README mismatch on the content.

After cloning the repo, what should be done?

[japerk]

@Daanielvb I've updated the readme and docs a bit. Scripts should be compatible with Python3.7 now, so you can run the training script that's appropriate, then load the model in your code.