Detroit News: The latest auto industry downturn had nearly halted production on the factory floor. The plant, which made high-tech machinery for car and truck plants, was limping by with only five workers. And parts orders were drying up. But today, the cavernous, two-story factory is ramping up production of another sort, churning out wind turbines to meet a fast-growing demand for this renewable power source. MasTech has restored its workforce to more than 40 employees — hiring many former auto …