Add the MSU MFSD modified verification protocol

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

bob/bio/face/config/preprocessor/face_crop_eyes.py

bob/bio/face/database/__init__.py

bob/bio/face/database/mobio.py

bob/bio/face/database/msu_mfsd_mod.py

bob/bio/face/test/test_databases.py

databases.txt

develop.cfg

doc/implementation.rst

doc/implemented.rst

setup.py

test-requirements.txt