PARIS (Reuters) - Capgemini's shares surged on Tuesday on the back of the software and consultancy company's 3.6 billion euro (3.2 billion pounds) takeover of smaller rival Altran to create a company with more than 250,000 staff.With the acquisition, Capgemini said it hoped to tap into demand from its customers for software services in industries ranging from telecom to aerospace. The combined company would have annual revenues of 17 billion euros.By comparison, Accenture's website says the..