Suggestion for improvement: Better samples

[timrobertson100]

It would be helpful for newcomers to the tilelive modules to have a fully working sample they can run. It is a bit daunting getting into this, as there are quite a lot of libraries and moving parts to understand.

I'm struggling to get a working version of converting my own vector tiles to PNGs using this, which is something those familiar with the code can probably do very quickly. Working examples would go a long way to helping in understanding I think.

Thanks