Integrate with Hyperdash

[hmc-cs-mdrissi]

The current training code just has prints for status updates. Hyperdash is a python library that is simple that streams the logs/visualizes graphs as training goes to a mobile app making it easier to watch and interpret training. Doing this also involves refactoring the training code since currently the training code is a bit of mess. It’d be nice if each model more clearly had its own training code and we do a better job sharing code across the various train functions.