Merge branch 'score-normalizations' into 'dask-pipelines'

bob/bio/base/pipelines/vanilla_biometrics/__init__.py

...bio/base/pipelines/vanilla_biometrics/abstract_classes.py

bob/bio/base/pipelines/vanilla_biometrics/legacy.py

bob/bio/base/pipelines/vanilla_biometrics/pipelines.py

bob/bio/base/pipelines/vanilla_biometrics/score_writers.py

bob/bio/base/pipelines/vanilla_biometrics/wrappers.py

bob/bio/base/pipelines/vanilla_biometrics/zt_norm.py

bob/bio/base/script/vanilla_biometrics.py

bob/bio/base/test/test_transformers.py

bob/bio/base/test/test_vanilla_biometrics.py

bob/bio/base/test/test_vanilla_biometrics_score_norm.py