Change in forecast 'Bellijst'

showing forecasts from locations that should be visited by tomorrow, is
not very useful. We know show forecasts from locations that should be
visited up to 14 days into the future. (as agreed upon during telephone
call of 4th of December)
in export to CSV: replace \n in fields to a white space

MS Excel from Geert treats fields that contain a \n as a new row.
This can be very confusing, therefore we add the call to "replace()" as
to change every \n by a white space.