Bootstrap load theme locally
You can download bootstrap package and include it in your theme folder.

and go to admin/appearance/settings/bootstrap
then go to 'Advanced' and change CDN provider to custom.
give your local bootstrap css,js urls. 

if you need to import it to a custom theme you can add it the bootstrap package like below. 

your_theme.info

stylesheets[all][] = css/bootstrap.css
scripts[] = js/bootstrap.min.js


define the regions you need in your custom theme info file.

remmber to use the 'https://www.drupal.org/project/jquery_update' module for JS.