A ‘Candide’ that has a lot to say
Leonard Bernstein kept coming back to his musical “Candide’’ over the decades, reworking and adding to his original 1956 score. Mary Zimmerman’s adaptation premiered last fall at the Goodman Theatre in Chicago and begins previews tomorrow at the Huntington Theatre Company, but she isn’t quite done, either - mostly, but not entirely. She’s mainly been cutting the book she penned fro…