Merge branch 'employStreams' into 'develop'

...gpu/GridGenerator/TransientBCSetter/TransientBCSetter.cpp

src/gpu/GridGenerator/TransientBCSetter/TransientBCSetter.h

...tructureInitializer/GridReaderGenerator/GridGenerator.cpp

src/gpu/VirtualFluids_GPU/GPU/CudaMemoryManager.cpp

src/gpu/VirtualFluids_GPU/KernelManager/BCKernelManager.cpp

src/gpu/VirtualFluids_GPU/LBM/LB.h

src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp

src/gpu/VirtualFluids_GPU/Parameter/CudaStreamManager.cpp

src/gpu/VirtualFluids_GPU/Parameter/CudaStreamManager.h

.../VirtualFluids_GPU/PreCollisionInteractor/ActuatorFarm.cu