Based on Mary Norton’s classic children’s book The Borrowers and adapted for the screen by the great Hayao Miyazaki, the latest film from Studio Ghibli*, The Secret World of Arrietty, is a delight, offering its viewers a gentle sweetness tinged with the slight ache of melancholy. After sitting through the energetic trailers for coming children’s films, all advertised as being in 3D and all featuring glossy, computer-generated characters aping for the camera and up to all kinds of…