By Eric Kelsey LOS ANGELES (Reuters) - Ray Manzarek, a founding member and keyboardist of 1960s rock group The Doors, died on Monday at a medical clinic in Germany at age 74 following a battle with cancer, the group's manager Tom Vitorino said. Manzarek, who lived in Northern California's Napa Valley wine country for the past decade, had been seeking treatment in Germany for bile duct cancer, Vitorino said. He died in Rosenheim, Germany, surrounded by his wife and brothers. ...