mettjus

Maybe this could be made overwritable via URL (i.e: `&file=FetchingMachine.js`). I am thinking someone could be interested in using the same gist form many machines, maybe.

I wasn't so far ahead with my proposal, even if it could be certainly possible. I am just considering, as a next step, the opportunity to have multiple machines packed...

I made a PR: https://github.com/statecharts/xstate-viz/pull/22

It only addresses fetching from gist, not saving.