GPU codes using KernelAbstractions.jl

Marco Artiano and I wrote some GPU codes using KernelAbstractions.jl with the help of Valentin Churavy. This is our first time using KernelAbstractions.jl, and we will appreciate any feedback and comments!

1. https://github.com/Arpit-Babbar/KernelAbstractionsFV.jl
2. https://github.com/MarcoArtiano/IncompressibleNavierStokes.jl