HBO’s long-gestating miniseries Lewis And Clark has gotten a formal green light, along with Matthias Schoenaerts (upcoming Far From The Madding Crowd) in a co-starring role with previously announced Casey Affleck (Interstellar). They will play William Clark and Meriwether Lewis, respectively. Production is slated to begin this summer on the six-hour miniseries executive produced by Tom Hanks, Gary Goetzman, Edward Norton, Brad Pitt, Dede Gardner, Tim Kelly and Adam…