Added bob_io_base pure C++ library.

bob/io/base/cpp/CodecRegistry.cpp

bob/io/base/cpp/HDF5Attribute.cpp

bob/io/base/cpp/HDF5Dataset.cpp

bob/io/base/cpp/HDF5Group.cpp

bob/io/base/cpp/HDF5Types.cpp

bob/io/base/cpp/HDF5Utils.cpp

setup.py