Add code for multi timeseries calcs in hprocessor app
Add code for multi timeseries calcs in hprocessor app

kickapoo/enhydris,aptiko/enhydris,kickapoo/enhydris,openmeteo/enhydris,kickapoo/enhydris,ellak-monades-aristeias/enhydris,openmeteo/enhydris,aptiko/enhydris,openmeteo/enhydris,aptiko/enhydris,ellak-monades-aristeias/enhydris,ellak-monades-aristeias/enhydris