Load model that was saved as JSON

[frodoCombs]

I'm really enjoying this library. Thank you for all your work!

At the moment, it is possible to train and save a random forest model with toJSON(), but I don't see how to load a saved model. It would be really useful to be able to load pre-trained models.

[frodoCombs]

In the p5.js world, this works:

let m;
function preload(){
   m = loadJSON('rf.json')
}
function setup(){
  rf = ML.RandomForestClassifier.load(m)
  let result = rf.predict(trainingSet)
  console.log(result)
}