Add mailing list reference to README
Add mailing list reference to README
marcjansen/mapfish-print,Galigeo/mapfish-print,sbrunner/mapfish-print,marcjansen/mapfish-print,mapfish/mapfish-print,sbrunner/mapfish-print,mapfish/mapfish-print,mapfish/mapfish-print,marcjansen/mapfish-print,Galigeo/mapfish-print,mapfish/mapfish-print,sbrunner/mapfish-print,marcjansen/mapfish-print,Galigeo/mapfish-print,mapfish/mapfish-print