As discussed in Jabber.
I've pushed a branch to https://github.com/andrewnicols/bootstrap.git docs.moodle.org
generates the appropriate CSS.
The CSS is wrapped in the following rather specific CSS class:
To use it, all targetted code must be in the appropriate div:
This means that when we get our new theme (also based on the same version of bootstrap, that we'll be able to simply remove this temporary stylesheet and the same layouts will continue to work. The additional div is then superflous but this doesn't matter and it can be removed at a later date without further work.