Merge branch 'csv-database' into 'master'

bob/bio/face/config/database/mobio.py

bob/bio/face/config/database/mobio_all.py

bob/bio/face/config/database/mobio_male.py

bob/bio/face/config/database/multipie.py

bob/bio/face/config/database/multipie_pose.py

bob/bio/face/database/__init__.py

bob/bio/face/database/mobio.py

bob/bio/face/database/multipie.py

bob/bio/face/database/sample_loaders.py

bob/bio/face/test/test_databases.py

conda/meta.yaml

doc/implemented.rst

test-requirements.txt