FormFactor API: new Bar and Ripple2 form factors

Core/Basics/BornAgainNamespace.h

Core/HardParticle/FormFactorBar.cpp

Core/HardParticle/FormFactorBar.h

Core/HardParticle/FormFactorLongRipple2Lorentz.cpp

Core/HardParticle/FormFactorRipple2.cpp

Core/HardParticle/FormFactorRipple2.h

Core/HardParticle/ProfileBar.cpp

Core/HardParticle/ProfileBar.h

Core/HardParticle/ProfileRipple1.cpp

Core/HardParticle/ProfileRipple2.cpp

Core/HardParticle/ProfileRipple2.h

Core/Parametrization/INodeVisitor.h

Core/StandardSamples/RipplesBuilder.cpp

Core/StandardSamples/SampleComponents.cpp

Core/includeIncludes/HardParticles.h

Doc/FFCatalog/fig/ff2/sim_Ripple2.py

...simulation/ex01_BasicParticles/AllFormFactorsAvailable.py

...simulation/ex03_InterferenceFunctions/TriangularRipple.py

GUI/ba3d/ba3d/model/model.cpp

GUI/ba3d/ba3d/model/particles.cpp