Usage:

Run calibrate.py to start calibrating the Sensel based on the prompt, and the begin typing. 'saved' holds the state of the saved calibration so that it may be reused. Set variable load_grid to True if you want to load from saved grid. Set variable save_grid to True if you want to save (overwrite) your next calibration. Uncomment 'show_plot()' if you want to see a heatmap of your keyboard. This will crash the Sensel Morph if you don't quickly close the graph.