Document database configuration parameters supported in req.params
Document database configuration parameters supported in req.params

See #134

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