All those Banksy billboards that popped up around Manhattan proved to mean something after all - they were to promote Banksy's show/installation in Greenwich Village, which opened today. "The Village Pet Store and Grill" has pet-like displays along with items that might make one hungry. Hot dogs and salami as gerbils, a hairless Tweety bird, fish sticks in a fish tank, chicken products in a coop, a grooming rabbit, a fur coat doubling as a......