refresh to use this as the new vocalization analysis wrapper
among other things, use plt get_cmap as color manager instead of an unwieldy list of colors
when no coords are present store a 2-element vector of nans instead of one so it is easier to replace them with actual values later on
minor changes
added load capabilities, made uses plt get_cmap as color picker instead of unwieldy list of colors, also flipped the y-axis so that plotting is more consistent with the old matlab markpens