Immortality leaves plenty of time for nostalgia, but Jackson Rathbone, known to fans the world over as vampire Jasper Hale in “The Twilight Saga,” is too busy to reminisce for long. Fresh off a string of international premieres for “Breaking Dawn — Part 2,” the fifth and final installment in the blockbuster series, Rathbone sat down with The Daily to diagnose his fan base’s PTSD — that’s Post-Twilight Saga Disorder — and discuss his latest creative endeavors.