Add css code for mobile compatibility of Scaffolds

Added:
  Css stuff to css scaffold template for the mobile compatibility.
  data-attribute to template index to get a pure css solution.

Scaffolds are powerful to develop prototypes
with the evolution of mobile I think it makes sense to have
the possibility of making prototypes that are seen well on Mobile

![Schermata 01-2456303 alle 15 57 34](https://f.cloud.github.com/assets/46208/56961/1a9a3d52-5b36-11e2-9b9e-dfb978bc0c9f.png)

![Schermata 01-2456303 alle 15 53 00](https://f.cloud.github.com/assets/46208/56958/f706bf8c-5b35-11e2-8b1f-fcad58a47d62.png)