Added conf file for probmaps, made some changes in geojson pre-processing, introduced radiobuttons in dropdown

Moved callbacks to separated files and applied changes to score update to support multiple scores and models.

Separated function to get timeseries from forecast and calculate the nearest neighbour and provided two methods, one reading a pre-processed feather format and another reading on the fly netcdf with xarray. Testing performances.

tuned tabs css, ...