(Reuters) - Mitt Romney has moved into a narrow lead over U.S. President Barack Obama in a small bounce for him from the Republican National Convention, a Reuters/Ipsos poll found on Thursday. Romney entered the week four points behind Obama in the first installment of a Reuters/Ipsos rolling poll, with Obama leading 46 percent to 42 percent. But the most recent daily rolling poll gave Romney a two-point lead of 44 percent to 42 percent among likely voters. The former governor of Massachusetts has been in the spotlight at the convention in Tampa, Florida, and was to make his acceptance...