Automatically retrain model for every edit to training data?

[damellis]

I realize that training the model can take a long time, but maybe we can do it in the background? It seems like it might be simpler to have the model always correspond to the latest collection of training data, rather than making the user manually decide to retrain it.

[damellis]

We probably need a function like setAutomaticTraining(bool) to enable or disable automatic training of the model depending on the example.