Add stylelint

[pixeldesu]

We're already linting our JS, so we shouldn't leave out the styles!

If you need a reference on how to use stylelint with Vue files, you can use this blog post as a guide!

What's to be done

• Install the stylelint, stylelint-processor-html, stylelint-webpack-plugin and stylelint-config-standard packages from npm
• Configure stylelint
• Add the stylelint plugin to the Webpack configuration
• Fix all problems that the linter throws

[pixeldesu]

Gave this an attempt just now and it's not as easy as I have imagined it, at least the Webpack HMR stuff isn't.

Investigated and it seems like stylelint added support for linting inside .vue files just earlier this week. Probably giving this a bit more time will yield better results and implementations.