Bringing back refactoring changes

[emilinecsa]

This pull request contains JJ's refactoring changes that we want to bring back to the ISIS-working branch.

List of modified files: 17_Post-Processing - BATCH I.ipynb 18_Post-Processing - BATCH II.ipynb 21_Post-Processing - General.ipynb Alouette_downloader.py Alouette_processor.py Alouette_processor2.py Alouette_processor2_cpu.py Alouette_processor2_gpu.py error_detection/scan_error_detection.py error_detection/scan_error_detection_multi_instance.py error_detection/scan_error_processor.py error_detection/scan_error_processor_ISIS.py feature_detection/feature_detection_main.py feature_detection/utils.py scan2data/helper_functions.py scan2data/image_segmentation/extract_ionogram_from_scan.py scan2data/image_segmentation/segment_images_in_subdir.py scan2data/image_segmentation/subset_preview_all_subdir.py scan2data/image_segmentation/test_image_segmentation.py scan2data/image_segmentation/trim_raw_metadata.py scan2data/ionogram_content_extraction/draft_trace_clustering.py scan2data/ionogram_content_extraction/draft_trace_curve_fitting.py scan2data/ionogram_content_extraction/extract_all_coordinates_ionogram_trace.py scan2data/ionogram_content_extraction/extract_select_parameters.py scan2data/ionogram_content_extraction/test_ionogram_content_extraction.py scan2data/ionogram_grid_determination/determine_default_grid_values.py scan2data/ionogram_grid_determination/grid_mapping.py scan2data/metadata_translation/determine_distinctions_num_vs_dot.py scan2data/metadata_translation/determine_leftside_metadata_grid_default_values.py scan2data/metadata_translation/leftside_metadata_grid_mapping.py scan2data/metadata_translation/test_leftside_metadata.py scan2data/metadata_translation/translate_leftside_metadata.py scan2data/process_directory.py scan2data/process_directory_md.py scan2data/user_input.py scan2data/user_input2.py scan2data/user_input_md.py

[emilinecsa]

Bringing back refactoring changes