Added most docs, misisng notebooks still

Added:

• docs:
  • look at Sphinx build docs...
  • how to use scripts OR shell
  • config files
  • main_ scripts
    • image parsing: main_raw_to_clips
    • (diverse_preprocessing)
    • skeletons
      • inference
      • assessment
      • finetune
    • classification
      • inference
      • prepare_learning_sets
      • finetune
      • Dubendorf_cleanup???