Move initialization and calculation of concentrations to own files

...rtualFluids_GPU/AdvectionDiffusion/AdvectionDiffusion.cpp

...VirtualFluids_GPU/AdvectionDiffusion/AdvectionDiffusion.h

src/gpu/VirtualFluids_GPU/GPU/CalcConc27.cu

src/gpu/VirtualFluids_GPU/GPU/CalcMac27.cu

src/gpu/VirtualFluids_GPU/GPU/GPU_Interface.h

src/gpu/VirtualFluids_GPU/GPU/GPU_Kernels.cuh

src/gpu/VirtualFluids_GPU/GPU/Init27.cu

src/gpu/VirtualFluids_GPU/GPU/InitAdvectionDiffusion27.cu

src/gpu/VirtualFluids_GPU/GPU/LBMKernel.cu

src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp

src/gpu/VirtualFluids_GPU/Parameter/Parameter.h

...ocessor/PreProcessorStrategy/InitCompAD27/InitCompAD27.cu

...Processor/PreProcessorStrategy/InitCompAD7/InitCompAD7.cu

src/gpu/VirtualFluids_GPU/Temperature/FindTemperature.cpp