Remove GKS usage in VirtualFluids.

CMakeLists.txt

Python/actuator_line/actuator_line.py

Python/boundary_layer/boundary_layer.py

README.md

apps/gpu/GKS/BoundaryJet/3rdPartyLinking.cmake

apps/gpu/GKS/BoundaryJet/BoundaryJet.cpp

apps/gpu/GKS/BoundaryJet/CMakeLists.txt

apps/gpu/GKS/BoundaryJet/CMakePackage.cmake

apps/gpu/GKS/Candle/3rdPartyLinking.cmake

apps/gpu/GKS/Candle/CMakeLists.txt

apps/gpu/GKS/Candle/CMakePackage.cmake

apps/gpu/GKS/Candle/Candle.cpp

apps/gpu/GKS/ChannelFlow/3rdPartyLinking.cmake

apps/gpu/GKS/ChannelFlow/CMakeLists.txt

apps/gpu/GKS/ChannelFlow/CMakePackage.cmake

apps/gpu/GKS/ChannelFlow/ChannelFlow.cpp

apps/gpu/GKS/ChannelFlowObstacle/3rdPartyLinking.cmake

apps/gpu/GKS/ChannelFlowObstacle/CMakeLists.txt

apps/gpu/GKS/ChannelFlowObstacle/CMakePackage.cmake

apps/gpu/GKS/ChannelFlowObstacle/ChannelFlowObstacle.cpp