* FTSEurofirst 300 up 0.8 pct, Euro STOXX 50 0.9 pct * Good start to U.S. fiscal talks spur rebound * Charts still bearish after support break By Francesco Canepa LONDON, Nov 19 (Reuters) - European stocks rose early on Monday, bouncing from a 3 1/2-month closing low, on signs political negotiations to overcome a major fiscal policy disagreement in the United States had begun well. On Friday, leaders of the U.S. Senate and House said they would be flexible in efforts to set