I think it is time for SublimeText to include HTML5 basic template and to include Bootstrap CSS support.
Bootstrap can be easily supported by creating a basic bootstrap template with links to CDN CSS files. The css files are at:
<https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css>
<https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js>