Added land cover and field maps for remaining regions

data/regions/bodensee/fields.tif

data/regions/bodensee/landcover.tif

data/regions/eichsfeld/fields.tif

data/regions/eichsfeld/landcover.tif

data/regions/hohenlohe/fields.tif

data/regions/jena-small/fields.tif

data/regions/jena-small/landcover.tif

data/regions/jena-small/weather.csv

data/regions/oberrhein/fields.tif

data/regions/oberrhein/landcover.tif