Reviewed by Gail M. Burns, November, 1998 If you love Shakespeare then this is your lucky month! The Manic Stage began the onslaught, opening “A Midsummer Night’s Dream” last Thursday. Williamstheatre, Mt. Greylock, and McCann weigh in this week with productions of “Twelfth Night”, “Hamlet”, and another “Midsummer” respectively later…