Now writing GeoTiff and having two bands: binary mask and probabilities

[GriffinBabe]

Resolves #61 and #62

Output GeoTiff example for parameters 664000 5611120 665000 5612120 2020-11-01 2021-10-31 --epsg 32631 can be found in my Public drive:
/data/users/Public/couchard/gfmap_cropland_inference_probabilities.tif

Output GeoTiff has two bands, the first one is the binary cropland mask and the second is the associated probabilities

[kvantricht]

Could we scale probabilities by a factor 100 to be able to save the result as integer instead of float? Need to see what kind of integer given that the label for now is binary but in croptype can become quite large.

[GriffinBabe]

@kvantricht I updated this to have uint8 values with 0-1 for crop/no-crop first layer and 0-100 for the probability layer.