Pdf versions of contour plots for output intensity for all form factors in User Manual Appendix.
Addition of a description of Core Shell particle in User Manual Appendix.

Form factors: addition of appendix to User Manual, schematic views and missing information to Doxygen

1. OutputData.h
2. MathFuctions.h

Conflicts:
	Core/PythonAPI/src/PythonModule.cpp
	Fit/PythonAPI/src/ISquaredFunction.pypp.cpp
	Fit/PythonAPI/src/PythonModule.cpp
	Fit/PythonAPI/src/SquaredFunctionDefault.pypp.cpp
	Fit/PythonAPI/src/SquaredFunctionWhichOnlyWorks.pypp.cpp
	Fit/PythonAPI/src/SquaredFunctionWithGaussianError.pypp.cpp
	Fit/PythonAPI/src/SquaredFunctionWithSystematicError.pypp.cpp

Regenerated IsGISAXS08 functional test references to take care of previous instabilities in 2d paracrystal interference function