disambiguate 2D and 3D lattice creation fcts

Core/Export/SampleToPython.cpp

Examples/Demos/simul_demo_lattice1.py

Examples/Demos/simul_demo_lattice2.py

...es/custom_objective_function/custom_objective_function.py

.../ex03_ExtendedExamples/external_minimizer/lmfit_basics.py

...xtendedExamples/external_minimizer/lmfit_with_plotting.py

.../ex03_InterferenceFunctions/CosineRipplesAtRectLattice.py

...erferenceFunctions/Interference2DCenteredSquareLattice.py

...nterferenceFunctions/Interference2DLatticeSumOfRotated.py

...n/ex03_InterferenceFunctions/Interference2DParaCrystal.py

...terferenceFunctions/Interference2DRotatedSquareLattice.py

...nterferenceFunctions/Interference2DSquareFiniteLattice.py

...ex03_InterferenceFunctions/Interference2DSquareLattice.py

...ulation/ex03_InterferenceFunctions/SpheresAtHexLattice.py

...simulation/ex03_InterferenceFunctions/TriangularRipple.py

...mulation/ex04_ComplexShapes/HexagonalLatticesWithBasis.py

...lation/ex06_Reflectometry/MaterialProfileWithParticles.py

...on/simulation/ex07_Miscellaneous/BoxesWithSpecularPeak.py

.../simulation/ex07_Miscellaneous/CylindersInAverageLayer.py

...lation/ex07_Miscellaneous/HalfSpheresInAverageTopLayer.py