CUDA support for ndlib

[xiaojiuwo1993]

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] No Describe the solution you'd like A clear and concise description of what you want to happen. When running diffusion simulation, multiple running is required to obtain a mean value on node influence, this process can be written for CUDA, and it will speed up when using GPU. Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered. No considered Additional context Add any other context or screenshots about the feature request here. Please add support for GPU CUDA.