muparser: add doxygen doc generation handling

- Add cmake WITH_DOC option.

- Add cmake/doxygen-modeling.conf.in & cmake/doxygen-sources.conf.in.
cellqss: fix missing install header

Add CellQSS.hpp & DllDefines.hpp files install during pkg compilation
decision : clean src install

Remove all *.cpp files install during pkg compilation.
differential: clean install

- Remove cmake subdirectory install during pkg compilation.
- Remove all *.cpp files install during pkg compilation.
- Fix Version.hpp install during pkg compilation.
dsdevs: fix missing install header

Add DSDevs.hpp & DllDefines.hpp files install during pkg compilation.
petrinet: clean install

Remove exp & data subdirectory install during pkg compilation.