On http://getbootstrap.com/customize/ it is possible to create and download a custom Bootstrap configuration. Included in the download is a file called config.json
I
Scroll down to the end of the config.json file, the latest entry is "customizeUrl" along with the customization url on bootsrtap website. Eg:
"collapse.js", "scrollspy.js", "transition.js" ], "customizerUrl": "http://getbootstrap.com/customize/?id=eaaea96b66287112b6c7" }