Revert "Bootstrap styles"

This reverts commit 2d6cfef66a57a6c55edce7c34db6886dff08f25f.
Add bootstrap with less

This will allow more natural modification of bootstrap and addition of
features than the scss or copy-paste methods as it more closely matches
upstream twitter bootstrap.
* http://www.sitepoint.com/twitter-bootstrap-less-and-sass-understanding-your-options-for-rails-3-1/
* http://metaskills.net/2011/09/26/less-is-more-using-twitter-bootstrap-in-the-rails-3-1-asset-pipeline/