manual decoupling of include's; move Rotations back to Samples

Core/Detector/IDetector2D.cpp

Core/Detector/IDetector2D.h

Core/Export/SampleLabelHandler.cpp

Core/Export/SampleLabelHandler.h

Core/Reflections/MultiLayer.cpp

Core/Reflections/MultiLayer.h

Core/Samples/ICompositeSample.cpp

Core/Samples/IParticle.cpp

Core/Samples/IParticle.h

Core/Samples/Rotations.cpp

Core/Samples/Rotations.h