Add UserCSS meta.

[tplk]

It'd be nice to have automatic updates handled by Stylus. It requires adding @updateURL meta to the built css. Reference: UserCSS.

If that's an option I could look into it and create a PR.

[mastermel]

This sounds like a good improvement to me! You want to put together a PR for it? Just make sure that you don't commit a change to the raw css file directly, but rather update the build process to include it.

[tplk]

Yeah, I think I'll have some time tomorrow.

Syncing versions might be a problem. I've solved it by running a script on npm version command, should be quite easy to adapt it here.