Initial port to dask pipelines

bob/pad/base/__init__.py

bob/pad/base/algorithm/__init__.py

bob/pad/base/database/database.py

bob/pad/base/database/file.py

bob/pad/base/pipelines/__init__.py

bob/pad/base/pipelines/vanilla_pad/__init__.py

bob/pad/base/pipelines/vanilla_pad/abstract_classes.py

bob/pad/base/pipelines/vanilla_pad/implemented.py

bob/pad/base/pipelines/vanilla_pad/legacy.py

bob/pad/base/script/__init__.py

bob/pad/base/script/pad_commands.py

bob/pad/base/script/vanilla_pad.py

bob/pad/base/utils/helper_functions.py

conda/meta.yaml

requirements.txt

setup.py