Add LBP Histograms

bob/pad/face/__init__.py

bob/pad/face/algorithm/__init__.py

bob/pad/face/extractor/LBPHistogram.py

bob/pad/face/extractor/__init__.py

bob/pad/face/preprocessor/__init__.py

bob/pad/face/script/version.py

bob/pad/face/test.py

bob/pad/face/test/__init__.py

bob/pad/face/test/data/lbp.hdf5

bob/pad/face/test/test.py

doc/extra-intersphinx.txt

doc/guide.rst

doc/index.rst

doc/py_api.rst

requirements.txt