Hero slider component

I've extracted the common html and css of the best-place-to-be page to reuse it as a component in best in travel. 

The component looks like this, but the componen is only the background image, next/prev arrows and overlays. The content over the image is included as a partial in properties:
![screen shot 2014-09-24 at 13 24 14](https://cloud.githubusercontent.com/assets/1152640/4387675/5831afa8-43e0-11e4-9842-7d8c31835ab8.png)