The car maker Rolls Royce recorded its best-ever sales figures last year, signalling that the recession has done nothing to blunt the appetite for luxury among the world's wealthiest drivers.For the first time, China emerged as the company's biggest customer, edging past the United States and Britain.Rolls Royce said it sold more than three-and-a-half thousand cars last year - that's more than a third up on the year before.Founded in...