Return an error exit status if not all tests passes.

Written for GHOP by Turkay Eren.

If a todo is needed, put it in the tracker.

* Removed a #define from pyconfig.h. The macro was already defined a few lines higher.
* Fixed path to tix in the build_tkinter.py script
* Changed make_buildinfo.c to use versions of unlink and strcat which are considered safe by Windows (as suggested by MvL).
* Removed two defines from pyproject.vsprops that are no longer required. Both are defined in pyconfig.h and make_buildinfo.c doesn't use the unsafe versions any more (as suggested by MvL).
* Added some more information about PGO and the property files to PCbuild9/readme.txt.

Are you fine with the changes, Martin?

Silence more warnings, _CRT_NONSTDC_NO_DEPRECATE is already defined in pyconfig.h but several projects don't include it.

Fixed get_config_h_filename for Windows. Without the patch it can't find the pyconfig.h file inside a build tree.
Added several small unit tests for sysconfig.

Factor-out common calling code by simplifying the length_hint API.
Speed-up the function by caching the PyObject_String for the attribute lookup.

The macros _WIN32, _WIN64 and _M_X64 are defined by the compiler. The VS 2008 IDE doesn't know about (some) of the macros and can display wrong information. In my case a section #ifdef _WIN64 was grayed out although the platform was x64. I've added the macros to pyproject.vsprops and x64.vsprops.
I've also added a paragraph about the property files to the readme and fixed the order of pyupdate > pyinstrument.

by purging bindings to OSA's debug API's. Those APIs we're completely
unsupported on OSX 10.4 and are no longer available on OSX 10.5.

Note that this patches a generated file. This is somewhat acceptable because
regenerating the file is non-trivial and wouldn't use system headers anyway.

Written by Ross for GHOP.

merge -r59315:59316 from py3k: Fix issue #1553: An errornous __length_hint__ can make list() raise a SystemError

These optimizations create smaller and a bit faster code on my machine. I've also disabled an optimization that may be dangerous. Intrinsic functions conflict with errno.

Added warning that make install may overwrite or masquerade the default python binary. Use make altinstall instead.
A native English speaker may want to rephrase the paragraph. ;)