Added ParticleCollection and IParticle interface

Core/Algorithms/inc/DiffuseDWBASimulation.h

Core/Algorithms/inc/Distributions.h

Core/Algorithms/src/DiffuseDWBASimulation.cpp

Core/Algorithms/src/DistributionHandler.cpp

Core/Algorithms/src/Distributions.cpp

Core/Algorithms/src/LayerStrategyBuilder.cpp

Core/PythonAPI/inc/IParticle.pypp.h

Core/PythonAPI/inc/PythonCoreList.h

Core/PythonAPI/src/DistributionCosine.pypp.cpp

Core/PythonAPI/src/DistributionGate.pypp.cpp

Core/PythonAPI/src/DistributionGaussian.pypp.cpp

Core/PythonAPI/src/DistributionLogNormal.pypp.cpp

Core/PythonAPI/src/DistributionLorentz.pypp.cpp

Core/PythonAPI/src/IParticle.pypp.cpp

Core/PythonAPI/src/LatticeBasis.pypp.cpp

Core/PythonAPI/src/MesoCrystal.pypp.cpp

Core/PythonAPI/src/Particle.pypp.cpp

Core/PythonAPI/src/ParticleCoreShell.pypp.cpp

Core/PythonAPI/src/ParticleInfo.pypp.cpp

Core/PythonAPI/src/ParticleLayout.pypp.cpp