setDates.RdSets the run, ensemble, and sensitivity analysis dates of PEcAn Settings
setDates(settings, startDate, endDate)A Settings object
The desired start and end dates
The original Settings object with updated dates
Sets the start/end dates in settings$run to the specified dates,
and sets the corresponding years for settings$ensemble and
settings$sensitivity.analysis.
Either date can be omitted to leave it unchanged.