Bootstrap is no longer organizationally affiliated with Twitter

See http://getbootstrap.com/about/#brand & https://github.com/twbs/bootstrap/issues/9899
Bootstrap is MIT-licensed since v3.1.0

See http://blog.getbootstrap.com/2014/01/30/bootstrap-3-1-0-released/
Merge pull request #102 from cvrebert/gh-pages

Update Bootstrap's info