First running version of PlanarAverageProbe and minor changes to other probe types

apps/gpu/LBM/BoundaryLayer/BoundaryLayer.cpp

src/gpu/VirtualFluids_GPU/GPU/CudaMemoryManager.cpp

...s_GPU/PreCollisionInteractor/Probes/PlanarAverageProbe.cu

...ds_GPU/PreCollisionInteractor/Probes/PlanarAverageProbe.h

...ualFluids_GPU/PreCollisionInteractor/Probes/PlaneProbe.cu

...tualFluids_GPU/PreCollisionInteractor/Probes/PlaneProbe.h

...ualFluids_GPU/PreCollisionInteractor/Probes/PointProbe.cu

...tualFluids_GPU/PreCollisionInteractor/Probes/PointProbe.h

.../VirtualFluids_GPU/PreCollisionInteractor/Probes/Probe.cu

...u/VirtualFluids_GPU/PreCollisionInteractor/Probes/Probe.h