Visual Studio 2017 support

[ghost]

Hello. Will MSVC 2017 support? I tried compile, but not compiling.

[nyorain]

Hey i guess MSVC 2017 has not implemented most of C++17 yet, so it will not work for the moment. As soon as Microsoft ships a solid C++17 compiler I will probably see to it.

[nyorain]

While VS 2017 won't be supported for the reasons explained in detail in #8, I just checked and Microsoft indeed managed to fix C++ support in MSVC during the last years far enough that vpp can be compiled on VS 2019 (with some minor patches that are mostly fixes for errors on my side, will push the update soon). The only remaining problem is that to compile vpp as dll, we have to declare all symbols as dllexport which is a pain in the ass but I'll probably end up doing it.