Option format inconsistent re: hyphens/underscores

[boyleconnor]

Some of the options in the graph model scripts are of the format --with-hyphens and some are of the format --with_underscores.

E.g.:

• https://github.com/isi-vista/adam/blob/a43a362565c8bd30b9622f2662840145b97ef53b/adam_preprocessing/shape_stroke_graph_learner.py#L42
• https://github.com/isi-vista/adam/blob/a43a362565c8bd30b9622f2662840145b97ef53b/adam_preprocessing/shape_stroke_graph_inference.py#L68

It should be consistent, and my inclination is that it should by --with-hyphens.

[lichtefeld]

I agree with the hyphens preference.