Why do you ask money for your work? Also a stupid question, isn't it?

I don't know whether there is a way to configure this, but there's no need for such an option since it doesn't affect speed because those files aren't loaded.

There are tons of tutorials on how to set Sublime Text up, please look first. And HTML5 is HTML, CSS and Javascript, there is no special syntax. I even wonder whether you know what you're doing buying this editor.