Fixes bug #525620.

This addresses the issue in SF bug #515745.

open_the_file:  Some (not all) flavors of Windows set errno to EINVAL
when passed a syntactically invalid filename.  Python turned that into an
incomprehensible complaint about the mode string.  Fixed by special-casing
MSVC.

  when PyType_Ready() was called, if ob_type was found to be NULL, it
  was always set to &PyType_Type; now it is set to base->ob_type,
  where base is tp_base, defaulting to &PyObject_Type.

- PyType_Ready() accidentally did not inherit tp_is_gc; now it does.

Bugfix candidate.

I probably didn't do a correct thing for the LaTeX spelling of the
integer 1.

Add standard header preamble and footer, a-la intobject.h.  Main purpose is extern "C" for C++ programs.

the big numbers.

  method returns something that's not a C instance, its __init__ is
  not called.  [SF bug #537450]

document to the C API reference.  Move some instructional text from the API
reference to the Extending & Embedding manual.

Fix the descriptions of the es and es# formats for PyArg_Parse*().
This closes SF bug #536516.

checkin.  And since that one was, this one is also a:

Bugfix candidate.

Change pickling format for bools to use a backwards compatible
encoding.  This means you can pickle True or False on Python 2.3
and Python 2.2 or before will read it back as 1 or 0.  The code
used for pickling bools before would create pickles that could
not be read in previous Python versions.

either.

Bugfix candidate.

They now raise an NotImplementedError to hint to the truth ;-)

accounts for every byte.

runtime multiplications and divisions, via the scheme developed with
Vladimir Marangozov on Python-Dev.  The pool_header struct loses its
capacity member, but gains nextoffset and maxnextoffset members; this
still leaves it at 32 bytes on a 32-bit box (it has to be padded to a
multiple of 8 bytes).

speeds up __getitem__ and __setitem__ in subclasses of built-in
sequences.

It's much revised because I took the opportunity to refactor the code
somewhat (moving a large section of duplicated code to a helper
function) and added comments to a series of functions.

Updated productionlist environment.

This change is similar to the supplied patch, but does not save the opener
when a proxy configuration is specified.
This closes SF patch #523415.