- provide the CF-FC Interface to the gpu solver

src/GridGenerator/grid/Grid.cu

src/GridGenerator/grid/GridBuilder/GridBuilder.h

src/GridGenerator/grid/GridBuilder/LevelGridBuilder.cpp

src/GridGenerator/grid/GridBuilder/LevelGridBuilder.h

src/GridGenerator/grid/GridInterface.cuh

...tor/grid/GridStrategy/GridCpuStrategy/GridCpuStrategy.cpp

...tor/grid/GridStrategy/GridGpuStrategy/GridGpuStrategy.cpp

src/GridGenerator/io/GridVTKWriter/GridVTKWriter.cpp

...VirtualFluids_GPU/DataStructureInitializer/GridProvider.h

...U/DataStructureInitializer/GridReaderFiles/GridReader.cpp

...GPU/DataStructureInitializer/GridReaderFiles/GridReader.h

...tructureInitializer/GridReaderGenerator/GridGenerator.cpp

...aStructureInitializer/GridReaderGenerator/GridGenerator.h

src/VirtualFluids_GPU/LBM/Simulation.cpp

targets/apps/HULC/main.cpp