shorter name for FootprintGauss

Core/Beam/Beam.cpp

Core/Beam/FootprintGauss.cpp

Core/Beam/FootprintGauss.h

Core/Beam/FootprintSquare.cpp

Core/Beam/FootprintSquare.h

Core/Export/SimulationToPython.cpp

Core/Parametrization/INodeVisitor.h

Core/StandardSamples/StandardSimulations.cpp

...ExtendedExamples/specular/RealLifeReflectometryFitting.py

...on/simulation/ex06_Reflectometry/BeamAngularDivergence.py

...thon/simulation/ex06_Reflectometry/FootprintCorrection.py

Examples/python/simulation/ex07_Miscellaneous/DepthProbe.py

GUI/coregui/Models/FootprintItems.cpp

GUI/coregui/Models/TransformFromDomain.cpp

Tests/UnitTests/Core/Fresnel/SpecularScanTest.cpp

Tests/UnitTests/Core/Other/BeamFootprintTest.cpp

Tests/UnitTests/Core/Other/BeamTest.cpp

Wrap/swig/libBornAgainCore.i

auto/Wrap/libBornAgainCore.py

auto/Wrap/libBornAgainCore_wrap.cpp