“Wretches and Jabberers” is a buddy movie, a road trip movie and a moving adventure. But this new film is different than your typical mainstream fare. The documentary stars two autistic friends and advocates who do most of their communicating through typing. The story follows Larry Bissonnette and Tracy Thresher, as well as their assistants Pascal Cheng and Harvey Lavoy, as they travel around the world, meet other autistic people, and advocate for autism rights. We talked with the subjects and director of the film Gerry Wurzburg, yesterday.