Developers, make your own wordpress theme from scratch with starter_v1, starter_v1 is based on underscores http://underscores.me/ Enjoy :)

This theme including boostrap.

All the style should be in imports folder, use compass in your theme folder for tracking every changes.

Now you're ready to go! The next step is easy to say, but harder to do: make an awesome WordPress theme. :)

Good luck!