Update bootstrap

[matthewberryman]

We should update bootstrap, in particular for woff2 font for Firefox. @talltom are the css and js files straight out of (an older version of) bootstrap?

[tomasholderness]

Currently unable to install build dependencies...will keep you posted.

sass/node-sass#641

[matthewberryman]

@talltom I will provide you a login on a Linux VM so you can work there as the sass bug is OS X specific.