ResolutionFunction2DSimple is renamed into ResolutionFunction2DGaussian

App/src/TestDetectorResolution.cpp

App/src/TestFittingModule1.cpp

App/src/TestFittingModule2.cpp

App/src/TestFittingModule3.cpp

App/src/TestInfLongBox.cpp

App/src/TestInfLongRipple1.cpp

App/src/TestInfLongRipple2.cpp

App/src/TestIsGISAXS12.cpp

App/src/TestIsGISAXS13.cpp

App/src/TestIsGISAXS5.cpp

App/src/TestRipple1.cpp

App/src/TestRipple2.cpp

Core/Algorithms/inc/ResolutionFunction2DGaussian.h

Core/Algorithms/src/ResolutionFunction2DGaussian.cpp

Core/PythonAPI/inc/PythonCoreList.h

Core/PythonAPI/inc/ResolutionFunction2DGaussian.pypp.h

Core/PythonAPI/src/PythonModule.cpp

Core/PythonAPI/src/ResolutionFunction2DGaussian.pypp.cpp

Core/StandardSamples/StandardSimulations.cpp

Fit/PythonAPI/src/PythonModule.cpp