[PATCH 1 of 4 v2] internals: move the bitmanipulation routines into its own file

[Yuya Nishihara]

On Thu, 23 Jun 2016 08:57:08 +0200, Maciej Fijalkowski wrote:
> # HG changeset patch
> # User Maciej Fijalkowski <fijall at gmail.com>
> # Date 1465211293 -7200
> #      Mon Jun 06 13:08:13 2016 +0200
> # Node ID d62df3ee14e3b2cf658c247233bda60def219e0f
> # Parent  98e8313dcd9e98c67d65de9ee49c88082406cb3f
> internals: move the bitmanipulation routines into its own file
>
> This is to allow more flexibility with the C sources -- now the
> bitmanipulation routines can be safely imported without importing Python.h

This removes several typedefs and inline macro from util.h, which appear to
cause compile error on Windows.

Perhaps we'll need a utility header that does not depend on Python.h,
something like util.h and pyutil.h?