Beautify Core directory

Core/Aggregate/FTDecayFunctions.cpp

Core/Aggregate/FTDecayFunctions.h

Core/Aggregate/FTDistributions1D.cpp

Core/Aggregate/FTDistributions1D.h

Core/Aggregate/FTDistributions2D.cpp

Core/Aggregate/FTDistributions2D.h

Core/Aggregate/FormFactorCoherentPart.h

Core/Aggregate/FormFactorCoherentSum.h

Core/Aggregate/IDistribution1DSampler.h

Core/Aggregate/IDistribution2DSampler.cpp

Core/Aggregate/IDistribution2DSampler.h

Core/Aggregate/IInterferenceFunction.cpp

Core/Aggregate/IInterferenceFunction.h

Core/Aggregate/IPeakShape.cpp

Core/Aggregate/IPeakShape.h

Core/Aggregate/InterferenceFunction1DLattice.cpp

Core/Aggregate/InterferenceFunction2DLattice.cpp

Core/Aggregate/InterferenceFunction2DLattice.h

Core/Aggregate/InterferenceFunction2DParaCrystal.cpp

Core/Aggregate/InterferenceFunction2DParaCrystal.h