PARIS (Reuters) - Relations between France and Germany are unaffected by Chancellor Angela Merkel's criticism of French economic performance and the two countries will continue working together, a French presidential source said on Friday. "These comments in no way modify the bilateral dynamic that is in motion," the source said. Merkel earlier criticized France as she and Socialist President Francois Hollande tussle over how to tackle Europe's deepening debt crisis ahead of a pivotal election in Greece and an end-month summit to agree urgent solutions. ...