It’s dripping and cold here, which is nothing new in the long stretch of gray that defines the season between February and June in New England. Spring doesn’t come here in the usual sense, which implies a gradual warming up, a greening and blooming until you wake up one day to realize you’ve eased into Summer. Spring, at least here on the solid granite peninsula of Cape Ann, comes in snatches. Which means it sometimes feels as though it hardly comes at all. A warm day here, a warm-ish day there, with cold rain in between.