SurfaceMaterialMap added

Core/include/Acts/Detector/TrackingGeometry.hpp

Core/include/Acts/Detector/TrackingVolume.hpp

Core/include/Acts/Layers/Layer.hpp

Core/include/Acts/Surfaces/Surface.hpp

Core/include/Acts/Surfaces/detail/Surface.ipp

Core/src/Detector/TrackingGeometry.cpp

Core/src/Detector/TrackingVolume.cpp

Core/src/Layers/Layer.cpp

Core/src/Tools/CuboidVolumeBuilder.cpp

Core/src/Tools/PassiveLayerBuilder.cpp

Plugins/DD4hep/src/DD4hepLayerBuilder.cpp

Plugins/TGeo/src/TGeoDetectorElement.cpp

.../Acts/Tests/CommonHelpers/CylindricalTrackingGeometry.hpp

.../include/Acts/Tests/CommonHelpers/DetectorElementStub.hpp

Tests/Core/Surfaces/SurfaceTests.cpp