Attempting Horrible Hack to make head.js work in IE9, see
https://github.com/headjs/headjs/issues/203.  Minified using a random
online minifier that uses UglyfyJS.  Definitely something we want the
HeadJS folk to fix, but this nasty patch should get IE9 working again.
Merge branch 'master' of ssh://github.com/Fabrik/fabrik