Negroes and Whites AcrossState Mourn DeathKingALBANY. N.Y. (AP) - Ne-(roe* and whites across upstate New York mourned today the death of Dr. Martin Luther King Jr. amid appeal* that none be* tray the spirit of nonviolence the civil • rights leader had. cherished.Negro ministers here urged in a statement Thursday night that the people of our community fl.planned tributes to the slain minister.This assassination could actas a catalyst to create violence in the streets, J. Wesley Acosta, president of the Binghamton-based chapter of the Congress of Racial Equality, told a reporter Thursday night.Acosta added that he hoped this would not be the case, lest the Durnose Dr. Kina died for