Add matfaust wrapper to palm4msa2020 and refactor 2016 palm4msa mex code.

src/algorithm/factorization/faust_StoppingCriterion.hpp

wrapper/matlab/+matfaust/+fact/fgft_palm.m

wrapper/matlab/+matfaust/+fact/palm4msa.m

...per/matlab/+matfaust/+factparams/@ParamsFact/ParamsFact.m

...tfaust/+factparams/@StoppingCriterion/StoppingCriterion.m

wrapper/matlab/CMakeLists.txt

wrapper/matlab/doc/mexPALM4MSA2020.m.in

wrapper/matlab/src/mexPALM4MSA2020.cpp.in

wrapper/matlab/src/mexPalm4MSA.cpp.in

wrapper/matlab/tools/mx2Faust.cpp

wrapper/matlab/tools/mx2Faust.h

wrapper/matlab/tools/mx2Faust.hpp