Merge branch 'train-pipeline' into 'master'

bob/bio/base/algorithm/gmm.py

bob/bio/base/database/filelist/query.py

bob/bio/base/pipelines/__init__.py

bob/bio/base/pipelines/entry_points.py

bob/bio/base/pipelines/wrappers.py

bob/bio/base/script/gen.py

bob/bio/base/script/pipeline_train.py

bob/bio/base/test/test_pipeline_simple.py

bob/bio/base/test/test_pipeline_train.py

bob/bio/base/test/test_transformers.py

conda/meta.yaml

setup.py