use pybind11 package in VSCODE

Hello, @smrfeld ,Thanks for sharing this pybind11-cmake tutorial! Actually, This is not a issue but a request. 

I am a beginner of `pybind11` and this project helps me a lot. However, I am wondering how to let VSCODE automatically highlight pybind package like ordinary python pacakge, as well as automatically complete args and function names. Should I add `py.in` files? 