Add count of Windshaft renderer cache hits in benchmark
Add count of Windshaft renderer cache hits in benchmark

wsw0108/Windshaft,manueltimita/Windshaft,HydroLogic/Windshaft,wsw0108/Windshaft,manueltimita/Windshaft,CartoDB/Windshaft,HydroLogic/Windshaft,CartoDB/Windshaft,CartoDB/Windshaft,HydroLogic/Windshaft,manueltimita/Windshaft,wsw0108/Windshaft