- refactoring

src/GridGenerator/grid/Grid.cu

src/GridGenerator/grid/Grid.cuh

src/GridGenerator/grid/GridBuilder/GridBuilder.h

src/GridGenerator/grid/GridBuilder/LevelGridBuilder.cpp

src/GridGenerator/grid/GridBuilder/LevelGridBuilder.h

src/GridGenerator/grid/GridFactory.cpp

src/GridGenerator/grid/GridInterface.cu

src/GridGenerator/grid/GridInterface.cuh

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

src/GridGenerator/grid/distributions/Distribution.cpp

src/GridGenerator/grid/distributions/Distribution.h

src/GridGenerator/grid/kernel/runGridKernelGPU.cu

src/GridGenerator/grid/partition/Partition.cpp

src/GridGenerator/io/GridVTKWriter/GridVTKWriter.cpp

...rtualFluids_GPU/DataStructureInitializer/GridProvider.cpp

...tructureInitializer/GridReaderGenerator/GridGenerator.cpp