use `vtkPython.h` instead of `Python.h` (!5973) · Merge requests · VTK / VTK · GitLab

Utkarsh Ayachit requested to merge utkarsh.ayachit/vtk:static-build-python-fixes into master Sep 11, 2019

addresses windows + debug build issues.

Also makes vtkPython.h includable in C code, not just C++.