Provide a way to persist sessions with gists

[Emilgardis]

I think it would be neat if the website could utilize https://gist.github.com/ to store sessions, this way you could track changes and persist across different browsers

[Ryex]

I actually had some nice thoughts about this early on.
I couldn't decide if if it should support gist or something more generic like pastebin though.
in theory it's dead simple and can make share links shorter though