Add optional cumulus project
Add optional cumulus project to superbuild. It is implemented as a dummy project that encapsulates the 4 python projects in the superbuild. It also sets corresponding cmake vars in the cmb and smtk projects.
Add optional cumulus project to superbuild. It is implemented as a dummy project that encapsulates the 4 python projects in the superbuild. It also sets corresponding cmake vars in the cmb and smtk projects.