Add vcpkg support

[saedrna]

vcpkg is a msvc package manage made by Microsoft, and already support all the deps of Open3D.

I have made a working port (in my own vcpkg repo, see here), but because my own repo have many other changes for my own use, I can not make a pull request.

So, if it's possible for the open3d owner to port this? What's better, you can also add more options and remove the ugly patch, this is the recommend way for vcpkg.

Han