cmake ok for macos without fftw

HySoP/CMakeLists.txt

HySoP/hysop/__init__.py.in

HySoP/hysop/operator/Advection.py

HySoP/hysop/operator/AdvectionDOp.py

HySoP/hysop/operator/ContinuousOperator.py

HySoP/hysop/operator/DiscreteOperator.py

HySoP/hysop/operator/InterpolationDOp.py

HySoP/hysop/operator/RemeshingDOp.py

HySoP/hysop/operator/TagDOp.py

HySoP/hysop/operator/VelocityDOp.py

HySoP/hysop/operator/VelocityOp.py

HySoP/hysop/operator/VolumeDOp.py

HySoP/hysop/operator/__init__.py

HySoP/hysop/problem/ContinuousProblem.py

HySoP/hysop/problem/ContinuousTransportProblem.py

HySoP/hysop/problem/DiscreteProblem.py

HySoP/hysop/problem/DiscreteTransportProblem.py

HySoP/hysop/problem/__init__.py

HySoP/hysop/utils/ForwardEuler.py

HySoP/hysop/utils/GPUParticularSolver.py