Fix an off by one error in the handling of the end day for repeating the climatology (leap years were not properly coded). Also adjust comment widths to fit better.
Add support for using E-HYPE climatology derived from the modelled time series. This is done by checking the date value (less than 367 and it is assumed to be climatology. A new argument is required for climatology (the model year) because otherwise it is not possible to clamp the discharge to a specified period. The fluxes are repeated for a year before and after the target year in case we have a model run which crosses a year boundary.