output data calendar set to "standard" by default and time unit to be adjusted #215
Description
the output netcdf file has by default "standard" as a calendar type instead of the original data calendar (i.e. Gregorian)
also the time unit from original data is often in days since the beginning of the simulation chunk (1 year or 10 years), while in cmorized data it should be a general one, like days since 1850-01-01 for the historical simulations.