PARIS (Reuters) - Urban violence in France fell to normal levels on Thursday after three weeks of rioting in run-down suburbs, allowing the government to begin mapping out plans to tackle the problems that sparked the unrest. ADVERTISEMENT Ninety-eight vehicles were set ablaze during the night, a sharp drop from the peak of the violence when 1,400 vehicles were torched in one night on November 6 by youths who say they are excluded from mainstream French society. "The situation has returned to normal because about 100 vehicles are set on fire each night in France," a police spokesman said. France's...