One of the most talked-about movies of the year, 'Manchester by the Sea' plays like an ode to the human condition. Casey Affleck, Michelle Williams, and Lucas Hedges turn in stellar performances, and writer-director Kenneth Lonergan keeps many hands close to his chest. With its unique blend of tragic circumstances and almost painfully comic moments, can one call it the Feel-Good Grief Movie of the Year? The doctors have plenty to say on the matter…