In the future, use DataHandleBase where needed.

- The artifacts shouldn't deviate from the default, ie don't set them without including the default values.
- Use `mkdir_local_data_link` to create a symlink to the LOCAL_DATA_PATH
- still need to remove a lot of the old environment config. Should be careful to not not mix benchmark-specific stuff into the envrionment setup.
- Should remove `TEMP_DIR` as a container is inherently temporary. Just use, `LOCAL_DATA_PATH`, or current directory.

- `util/print_env.sh` for debugging pipelines.

- This can be a tag or a branch (uses `git clone -b X`)

	modified:   options/tracker_reconstruction.py