RF: change script structure
RF: rename petprocessing directory to preprocessing
RF: moving preprocessing functions out of base_gui: make_subject_dict
RF: move func from base_gui to preprocess: make_dir
RF:move func from base_gui to preprocess: make_rec_dir
RF: move remove_files from base_gui to preprocess and update imports
RF:move copy_file, copy_files from base_gui to preprocess, update imports in scripts
RF:move copy_dir from base_gui to preprocessing, update imports
RF:move unzip_file unzip_files from base_gui to preprocessing, updated imports