Thespians stopped by Boston this week to read for the miniseries that will be based on BU professor and left-wing darling Howard Zinn's A People's History of the United States. And here's what happens when an intellectual heavyweight's work gets mixed up with this thing we call pop culture: --Somehow, it just doesn't seem right to call noted author Howard Zinn the "Zinn-Meister." It makes us think of the SNL skit with Rob Schneider at......