There have been recent developments, due to which Bootstrap has evolved. All this can be found on the official Bootstrap blog at http://blog.getbootstrap.com/, helping you stay in sync with the latest updates.
Let's take a look at some of the resources and relevant information on the official web page.
The Bootlint utility is an HTML linting tool for projects using Vanilla Bootstrap and can be implemented at the browser level or from the terminal using Node.js. Thus you can automatically check for common Bootstrap usage errors. You can also use Bootlint with Grunt, which is a JavaScript task runner. You can check the entire project at https://github.com/twbs/bootlint, which leads to the GitHub page, wherein you avail the latest updates and the usage instructions.