fontawesome 4.1.0 - NO IE7 support anymore!!

Updated to newest fontawesome 4.1.0

Some thoughts...

Fontawesome 4.1.0 have some new features

* [Larger icons](http://fortawesome.github.io/Font-Awesome/examples/#larger)
* [Fixed width icons](http://fortawesome.github.io/Font-Awesome/examples/#fixed-width)
* [List icons](http://fortawesome.github.io/Font-Awesome/examples/#list)
* [Bordered & Pulled Icons](http://fortawesome.github.io/Font-Awesome/examples/#bordered-pulled)
* [Spinning Icons](http://fortawesome.github.io/Font-Awesome/examples/#spinning)
* [Rotated & Flipped](http://fortawesome.github.io/Font-Awesome/examples/#rotated-flipped)
* [Stacked Icons](http://fortawesome.github.io/Font-Awesome/examples/#stacked)

Should we make twig functions for all those or some of them? - ofcourse they can all be just written directly in the template and it will work