- add periodicity for grid

src/GridGenerator/grid/Grid.cu

src/GridGenerator/grid/Grid.cuh

src/GridGenerator/grid/GridBuilder/LevelGridBuilder.cpp

src/GridGenerator/grid/GridBuilder/LevelGridBuilder.h

src/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp

...rtualFluids_GPU/DataStructureInitializer/GridProvider.cpp

...tructureInitializer/GridReaderGenerator/GridGenerator.cpp

...aStructureInitializer/GridReaderGenerator/GridGenerator.h

src/VirtualFluids_GPU/Output/WriteData.cpp

src/VirtualFluids_GPU/Parameter/Parameter.cpp

src/VirtualFluids_GPU/Parameter/Parameter.h

targets/apps/HULC/main.cpp