msvc support?

[paleozogt]

clang and gcc work great, but sadly msvc doesn't work:

C:\>where cl
where cl
C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\x86_amd64\cl.exe
C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\cl.exe

C:\>python -c "import ccsyspath; print(ccsyspath.system_include_paths('cl'))"
python -c "import ccsyspath; print(ccsyspath.system_include_paths('cl'))"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "Z:\venv-win\lib\site-packages\ccsyspath\paths.py", line 28, in system_include_paths
    start = lines.index(b'#include <...> search starts here:')
ValueError: '#include <...> search starts here:' is not in list