Fix several points and connect GivensFGFTComplex (C++) to pyfaust.

misc/test/CMakeLists.txt

misc/test/src/C++/GivensFGFTComplex.cpp.in

src/algorithm/factorization/faust_GivensFGFTComplex.h

src/algorithm/factorization/faust_GivensFGFTComplex.hpp

src/faust_linear_operator/CPU/faust_MatSparse.hpp

src/faust_linear_operator/faust_MatGeneric.hpp

wrapper/python/pyfaust/fact.py

wrapper/python/src/FaustCoreCy.pxd

wrapper/python/src/FaustFactGivensFGFT.h

wrapper/python/src/FaustFactGivensFGFT.hpp

wrapper/python/src/_FaustCorePy.pyx