Cleanup and updates

Sorry for not splitting this into separate branches, but I started wanting to only add the new Respond.js version and then I noticed the other stuff too.

I can try splitting the patches if you really want me to.

Thanks for the great service!

PS. Please verify everything works fine before merging this; I had a couple of issues on Windows and couldn't properly test everything.
PPS. One thing I noticed but didn't have time to look into, is if font-awesome is really used. Because I see the css included and the html markup added but I cannot trigger it to test (the class is `displayHelp`).