Improvements to light curve plotting

[jcsmithhere]

A lot more could be done with the light curve plotting.

Add in a way to easily plot individual light curves, for example:
bdf.get_clostest_by_time('2022-06-10 16:04:24').plot_lightcurve()
would download the appropriate data and plot the light curve.

Or, if you have a selection of lightcurves, plot them all:
bdf.get_clostest_by_time('2022-06-10 16:04:24', n=5).plot_lightcurve()
would plot all the light curves, maybe in separate plot windows or maybe all together.

Also, would be good to have a way to easily access the lightcurve object for a specific bolide, for example:
bdf.get_clostest_by_time('2022-06-10 16:04:24').lightcurve
would access the lightcurve object for this bolide.