Skeleton of function computeSuperresolutionUngerGPU is implemented.
Using setKernel and addKernel functions wherever it was possible to boost the performance
Implemented the function dualTVHuber for GPU
Implemented the function dualL1Difference for GPU
Implemented the function primal1N for GPU
Added two version of global and shared memory for funtions primal1NGpu, dualL1DifferenceGpu and dualTVHuberGpu. The shared version is not implemented yet.