by Natascia Ronchetti   The Modena-based auto business -- that galaxy of companies that revolves around top brands Ferrari, Maserati, Pagani -- is soaring, with an increase in revenues of 7.4% in 2014. It reached a turnover of €2.5 billion and is pulling ahead of the Piedmontese companies clustered around Fiat Chrysler Automobiles in Turin, which...