Homework can be added to the grand list of things that City Council member Peter Vallone is not so fond of. (That list includes graffitti, peeping toms, Con Ed, and pit bulls so far.) The other day, he said he wanted to introduce a cap on elementary school homework - 2 1/2 hours each day, plus one homework-free night a week. Pshaw, a homework-free night? That's called Friday! Vallone explained, "There is no study that......