rename -> IFormFactor::theFF <- evaluate

Sample/FFCompute/ComputeBA.cpp

Sample/FFCompute/ComputeBAPol.cpp

Sample/FFCompute/ComputeDWBA.cpp

Sample/FFCompute/ComputeDWBAPol.cpp

Sample/Particle/FormFactorCoreShell.cpp

Sample/Particle/FormFactorCoreShell.h

Sample/Particle/FormFactorCrystal.cpp

Sample/Particle/FormFactorCrystal.h

Sample/Particle/FormFactorWeighted.cpp

Sample/Particle/FormFactorWeighted.h

Sample/Scattering/FormFactorDecoratorMaterial.cpp

Sample/Scattering/FormFactorDecoratorMaterial.h

Sample/Scattering/FormFactorDecoratorPositionFactor.cpp

Sample/Scattering/FormFactorDecoratorPositionFactor.h

Sample/Scattering/FormFactorDecoratorRotation.cpp

Sample/Scattering/FormFactorDecoratorRotation.h

Sample/Scattering/IBornFF.cpp

Sample/Scattering/IBornFF.h

Sample/Scattering/IFormFactor.cpp

Sample/Scattering/IFormFactor.h