implements FDS 5 combustion model with mixing time scale

src/GksGpu/Analyzer/CupsAnalyzer.cpp

src/GksGpu/CellUpdate/CellUpdate.cu

src/GksGpu/CellUpdate/Reaction.cuh

src/GksGpu/DataBase/DataBase.cpp

src/GksGpu/DataBase/DataBase.h

src/GksGpu/DataBase/DataBaseAllocatorCPU.cpp

src/GksGpu/DataBase/DataBaseAllocatorGPU.cpp

src/GksGpu/DataBase/DataBaseStruct.h

src/GksGpu/FluxComputation/FluxComputation.cu

src/GksGpu/Initializer/InitializerKernel.cu

src/GksGpu/TimeStepping/NestedTimeStep.cpp

src/GksVtkAdapter/VTKAdapter.cpp

targets/apps/GKS/Flame7cm/Flame7cm.cpp

targets/apps/GKS/SandiaFlame_1m/SandiaFlame_1m.cpp