earthobservations/wetterdienst: Fix Mosmix station locations

Abstract

DWD: Add missing radar site "Emden" (EMD, wmo=10204) Mosmix stations: fix longitudes/latitudes to be decimal degrees (before they were degrees and minutes) Change key STATION_HEIGHT to HEIGHT, LAT to LATITUDE, LON to LONGITUDE Rename "Data" classes to "Values" Make arguments singula