Fixing python examples.

Core/Tools/IHistogram.h

.../fitting/ex02_FitCylindersAndPrisms/FitCylindersPrisms.py

...ing/ex03_FitSpheresInHexLattice/FitSpheresInHexLattice.py

..._FitSpheresInHexLattice/FitSpheresInHexLattice_builder.py

.../python/fitting/ex04_FitScaleAndShift/FitScaleAndShift.py

.../fitting/ex06_FitStrategies/FitStrategyAdjustMinimizer.py

...ples/python/fitting/ex07_FitAlongSlices/FitAlongSlices.py

...mulation/ex03_InterferenceFunctions/RectangularGrating.py

.../python/simulation/ex04_ComplexShapes/CustomFormFactor.py

auto/Wrap/libBornAgainCore.py

auto/Wrap/libBornAgainCore_wrap.cpp

auto/Wrap/libBornAgainCore_wrap.h

auto/Wrap/libBornAgainFit.py

auto/Wrap/libBornAgainFit_wrap.cpp

auto/Wrap/libBornAgainFit_wrap.h