ENH: Basic infrastructure for different data types

src/client/client.py

src/client/loomcomm_pb2.py

src/libloom/CMakeLists.txt

src/libloom/data.cpp

src/libloom/data.h

src/libloom/databuilder.h

src/libloom/interconnect.cpp

src/libloom/interconnect.h

src/libloom/loomcomm.pb.cc

src/libloom/loomcomm.pb.h

src/libloom/rawdata.cpp

src/libloom/rawdata.h

src/libloom/sendbuffer.cpp

src/libloom/sendbuffer.h

src/libloom/taskinstance.cpp

src/libloom/types.h

src/libloom/unpacking.cpp

src/libloom/unpacking.h

src/libloom/utils.h

src/libloom/worker.cpp