Fix a bug related to the cumulative option, now to be set explicitely, fix #281
Fix a bug related to the cumulative option, now to be set explicitely, fix #281

davidbgk/udata,jphnoel/udata,opendatateam/udata,jphnoel/udata,opendatateam/udata,etalab/udata,etalab/udata,davidbgk/udata,davidbgk/udata,etalab/udata,jphnoel/udata,opendatateam/udata