Four development firms are now vying to become the master developer overseeing transformation of the former Concord Naval Weapons Station, with plans for housing, retail and office space. The Contra Costa Times reports the city chose Catellus Development Corp., FivePoint Communities/Lennar, J.F. Shea Co., and SunCal in its search for a master developer. In 2012 the city adopted a plan that calls for housing and commercial space on 2,300 acres adjacent to the North Concord BART station. A master…