FTDecayFunction2D without default gamma=0; swapped Voigt args (regen, passed)

CHANGELOG

Core/Aggregate/FTDecay1D.cpp

Core/Aggregate/FTDecay1D.h

Core/Aggregate/FTDecay2D.cpp

Core/Aggregate/FTDecay2D.h

Core/Aggregate/FTDistributions2D.cpp

Core/Aggregate/FTDistributions2D.h

Core/StandardSamples/BoxesSquareLatticeBuilder.cpp

Core/StandardSamples/ParaCrystalBuilder.cpp

Core/StandardSamples/ParaCrystalBuilder.h

Core/StandardSamples/ParticleCompositionBuilder.cpp

Core/StandardSamples/SampleComponents.cpp

Core/StandardSamples/TwoDimLatticeBuilder.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