As the 34th annual Paleyfest winds toward its conclusion, The Paley Center for Media has saved some of the best panels for last, with an evening session Saturday for hit HBO series Westworld. Based on the 1973 film directed by Michael Crichton, the sci-fi series has embraced the mysteries at its core, dropping clues for viewers as to the future of the Westworld amusement park and its androids coming to self-awareness, and generating record ratings and serious fan…