Hard times are bringing changes to Stratford Hall Plantation. Stratford let go 14 of its 86 employees in April. Now managers plan to close the historic mansion for much of December and January, sell a herd of Angus cattle and reduce farm operations.To increase revenues, Stratford plans an aggressive campaign to market the historic property in Westmoreland County as a site for conferences and weddings, Executive Director Thomas C. Taylor said."We have to change with the times like everybody else," Taylor said. "We're tightening our belt across the board."Taylor said the cuts are due to the declining values of Stratford's...