Convert parameter space into a range rather than a grid.

Put model development pipeline in a .py file. Rewrote README. Made a config folder to store hyperparameter space searches. Co-authored with Chris and Csenge. Several TODOs in the README.

Set up MLFlow. Automatic server setup at localhost 5000. Experiments for decision tree, random forest, and xgboost set up, optimized through Bayesian search.