Resolve "Further validation anomaly detection"

Closes #67 (closed)

Quite big update for main, ~ includes:

• improvments in model architectures (proper VAE integration, VAE-CNN)
• single entry point (main.py)
• improved arg handling with argparse (--train, --validate and --visualize)
• automated threshold generation (included in export params)
• adjustements in val_model.py to fit with the updates