added some comments
implemented: plot a diagnostic type of multiple shots
tested the plots and implemented a legend
Implented a second legend to label the strapping V

The implementation of the second legend is straightforward by
apply a plt.gca().add_artist call.

Subtle implementation of plt.gca().get_legend_handles_labels() so that
I only place the labeled plot objects into the legend instead of all of
the plot objects.

	Ex: when plotting, I include both the raw and the smoothed data.
	If I don't take this into account, the legend is incorrect.