This version introduces:
- The class `ModelHandler ` that wraps Tree based models from the sklearn and xgboost libraries and includes training and testing common methods
- A module ( `plot_utils.py`) containing many ML plot utils. The module is compatible with the ModelHandler class
- A module named `analysis_utils.py` that will include the methods that will be employed for the physics analyses
- The tests of all the plot functions
- An minimal tutorial for using the package methods