Integration CP-ABE

Hi, we are Marco Magnani and Flavio Vadruccio.

We work with Michele for the integration of CP-ABE library int the Blogracy project.

This is the final version of our work.

Regards,
Marco
Flavio
This seems very fragile.  if( item.get("cipher-scheme").toString().equalsIgnoreCase("cpabe") should probably be incapsulated in some method.