It works the same as the Mastodon web UI for now - active toot is highlighted,
ancestors displayed in order above, descendants in order below. I hope to
add actual full threading one day.
Only supports single user, lots of display elements not supported yet.
But it actually has something to show.
Actually display a home timeline.
Still only single user, doesn't correctly handle boosts, CWs, and
probably a lot of other things.
