Porting to dask pipelines

bob/pad/face/config/algorithm/__init__.py

.../face/config/algorithm/video_cascade_svm_pad_algorithm.py

bob/pad/face/config/algorithm/video_gmm_pad_algorithm.py

bob/pad/face/config/algorithm/video_svm_pad_algorithm.py

bob/pad/face/config/brsu.py

bob/pad/face/config/casiafasd.py

bob/pad/face/config/casiasurf_color.py

bob/pad/face/config/celeb_a.py

bob/pad/face/config/database/__init__.py

bob/pad/face/config/database/batl/__init__.py

bob/pad/face/config/database/batl/batl_db.py

bob/pad/face/config/database/batl/batl_db_depth.py

bob/pad/face/config/database/batl/batl_db_infrared.py

...d/face/config/database/batl/batl_db_rgb_ir_d_grandtest.py

bob/pad/face/config/database/batl/batl_db_thermal.py

bob/pad/face/config/extractor/__init__.py

bob/pad/face/config/extractor/frame_diff_features.py

bob/pad/face/config/extractor/optical_flow.py

bob/pad/face/config/extractor/video_lbp_histogram.py

bob/pad/face/config/extractor/video_quality_measure.py