Postproc

[jdegerickx]

• added majority voting as a potential postprocessing pipeline (default remains smooth_probabilities)
• bug fixing when downloading assets
• "-cleaned" now removed from filename downloaded asset
• various minor fixes and updates on date slider, get seasons and ui_map
• added product post processing after download (split into classification and confidence .tif with LUT and color maps)
• is_binary argument in crop type pipeline should depend on lookup_table?