Added a very basic test for phase plane simulation and export
Added a very basic test for phase plane simulation and export

msreis/SigNetSim,vincent-noel/SigNetSim,vincent-noel/SigNetSim,msreis/SigNetSim,vincent-noel/SigNetSim,msreis/SigNetSim,vincent-noel/SigNetSim,msreis/SigNetSim