Prefix script for Twitter Bootstrap

This python script will iterate over each class in the Bootstrap framework and apply a tb- prefix. This helps when trying to namespace Bootstrap classes.

I didn't create this, but a big thanks to Francois Aucamp:

http://longtermcache.blogspot.com/2012/08/adding-prefix-to-bootstrap-css-classes.html

https://github.com/faucamp/bootstrap_namespace_prefixer

Bootstrap team should consider adding this to the customize and download options.