Some Visual Studio gitignores (#122)
Some Visual Studio gitignores (#122)

* Ignore /build directory

* Some Windows and Visual Studio .gitignores

robertnishihara/ray,atumanov/ray,robertnishihara/ray,atumanov/ray,alanamarzoev/ray,ujvl/ray-ng,pcmoritz/ray-1,richardliaw/ray,amplab/ray,amplab/ray,ray-project/ray,Wapaul1/ray,stephanie-wang/ray,pcmoritz/ray-1,robertnishihara/ray,amplab/ray,stephanie-wang/ray,atumanov/ray,alanamarzoev/ray,pcmoritz/ray-1,pcmoritz/ray-1,stephanie-wang/ray,robertnishihara/ray,stephanie-wang/ray,robertnishihara/ray,ray-project/ray,Wapaul1/ray,pcmoritz/ray-1,richardliaw/ray,pcmoritz/ray-1,ray-project/ray,ray-project/ray,stephanie-wang/ray,atumanov/ray,alanamarzoev/ray,atumanov/ray,robertnishihara/ray,richardliaw/ray,richardliaw/ray,richardliaw/ray,ray-project/ray,ujvl/ray-ng,atumanov/ray,ujvl/ray-ng,alanamarzoev/ray,richardliaw/ray,amplab/ray,Wapaul1/ray,robertnishihara/ray,atumanov/ray,Wapaul1/ray,Wapaul1/ray,ujvl/ray-ng,ray-project/ray,stephanie-wang/ray,atumanov/ray,robertnishihara/ray,ray-project/ray,stephanie-wang/ray,richardliaw/ray,richardliaw/ray,alanamarzoev/ray,pcmoritz/ray-1,Wapaul1/ray,ray-project/ray,stephanie-wang/ray,alanamarzoev/ray,stephanie-wang/ray,robertnishihara/ray,pcmoritz/ray-1