NEW YORK — Pro-Palestinian student protesters say they were blasted with a “foul-smelling” spray that required some of them to get medical treatment after a recent demo at Columbia University. At least 10 Columbia and Barnard students reported suffering symptoms including burning eyes, nausea and headaches, with three seeking medical attention, according to the Columbia Spectator, a student newspaper. The protest took place on the steps of the uptown university’s Low Library on Friday afternoon. The following day, a 24-year-old woman in attendance reported to police that when the substance was…