0.44.0

Added the ability to prefetch related objects. Here's an example:

band = await Band.objects(Band.manager).run()
>>> band.manager
<Manager: 1>

If a table has a lot of ForeignKey columns, there's a useful shortcut, which will return all of the related rows as objects.

concert = await Concert.objects(Concert.all_related()).run()
>>> concert.band_1
<Band: 1>
>>> concert.band_2
<Band: 2>
>>> concert.venue
<Venue: 1>

Thanks to @wmshort for all the input.