Bootstrap 3.0.3 migration + HTML template fixes

There's bugfixes and minor visual changes in that version of bootstrap, but the real change here is that I fixed the template HTML to use bootstrap3 instead of... well, nothing, because the classes on those elements didn't exist.

I also removed the HTML5 shim and added Respond.js instead. IE7 and below are not supported by Bootstrap 3.

Also I updated the copyright line and fixed the header display.