Steven Spielberg’s “Disclosure Day” is one of those movies that sweep you up from the start and rarely let you down. A rollicking science-fiction adventure, it finds Spielberg revisiting a genre that he has populated with charming and horrifying extraterrestrials, genetically engineered dinosaurs and plugged-in psychics, and which has inspired some of his most popular and critical successes. The first time I watched the new movie, I scribbled I am having so much fun in my notebook. It was a