By all means, see David Fincher’s gloriously pulpy “Gone Girl,” the elegant, surreal comedy “Birdman,” the percussive and intelligent idie “Whiplash,” and the staggering Edward Snowden documentary “Citizenfour.” But before Christopher Nolan’s sci-fi epic “Interstellar” arrives and wipes everyone’s brains, here are three films not to forget amid the increasingly crowded fall movie season.