Full disclosure: I’d previously never heard of photographer Garry Winogrand. And I know, it’s a lot like a film critic admitting he’d never heard of Frank Capra. But my ignorance proves bliss in discovering such a talented artist in Sasha Waters Freyer’s absorbing documentary, “Garry Winogrand: All Things Are Photographical.”Winogrand’s eye, his use of light and his vérité style are all jaw-dropping.