NEW YORK — Still unbeaten, still No. 1 in the AP Pro32 NFL power rankings. The Atlanta Falcons easily retained the top spot following a convincing win at Philadelphia, with the New York Giants edging the Houston Texans for second place in the latest rankings. The league’s only undefeated team received nine first-place votes and 319 points Tuesday from 10 of the 12 media members on The Associated Press panel reporting their ballots.