3D phone for the home hero

It should make the home a bit more interesting and give a hint what Montage is about.

![hero](https://f.cloud.github.com/assets/378023/926455/a021e674-ff8b-11e2-8e67-370e474fccc7.png)

Known issues:
* In Firefox the phone rotates, but stays flat
* In Chrome it flickers when hovering over
* Add support for touch input on mobile (currently it's hidden)

Here a [live demo](http://codepen.io/simurai/pen/zLgAl).