Gerald S. Krone, a founding member of the Negro Ensemble Company who joined Douglas Turner Ward and Robert Hooks in building a landmark center for African-American theater, died on February 20 at his home in Philadelphia. According to his longtime partner, Ivan Kaminoff, Krone died from Parkinson's disease. He was 86. At a time when black activism was engaged in a new militancy and urgency, Krone joined with pla…