#250 Python build improvements

[Ulf Lorenz]

For now just a collection of ideas. Needs splitting / refinement

• Try out namespacing to avoid potential problems with other Python packages that use the same library
  • Alternatively, link everything statically. We need to distribute under GPL anyway due to the FFTW license.
  • Without static linking, we could also use the vcpkg toolchain for automatically copying the dlls.
• Maybe create a real Python package from the Python interface
• Try out the MKL
• The MSVC libraries have a strange license. Should we go the route with the installer??