Mex function implementations/fixes

src/c/CudaMex/MaxFilterCircle.cpp

src/c/CudaMex/MaxFilterKernal.cpp

src/c/CudaMex/MaxFilterNeighborHood.cpp

src/c/CudaMex/MexCommand.cpp

src/c/CudaMex/MexCommand.h

src/c/CudaMex/MinFilterCircle.cpp

src/c/CudaMex/MinFilterKernal.cpp

src/c/CudaMex/MinFilterNeighborhood.cpp

src/c/CudaMex/OtsuThresholdFilter.cpp

src/c/CudaMex/Process.cu

src/c/CudaMex/Process.h