More Windows related fixes are coming soon

I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.

The patch also adds acosh, asinh, atanh, log1p and copysign to all platforms. Finally it fixes differences between platforms like different results or exceptions for edge cases. Have fun :)

'warnings' code in places where it was previously not possible (e.g., the
parser). It could also potentially lead to a speed-up in interpreter start-up
if the C version of the code (_warnings) is imported over the use of the
Python version in key places.

Closes issue #1631171.

It was only used as a helper in types.py to access types (GetSetDescriptorType and MemberDescriptorType),
when they can easily be obtained with python code.
These expressions even work with Jython.

I don't know what the future of the types module is; (cf. discussion in http://bugs.python.org/issue1605 )
at least this change makes it simpler.

Adds _winreg.DisableReflectionKey, EnableReflectionKey, QueryReflectionKey,
KEY_WOW64_64KEY and KEY_WOW64_32KEY.

in pyconfig.h, NTDDI_WIN2KSP4 is not *yet* defined, but will be at some point on some modules.

Let this line even for older SDKs, they don't use it anyway.

I applied the same changes manually to VS7.1 and VC6 files; completely untested.

(Christian, don't try too hard merging this change into py3k.
It will be easier to do the same work again on the branch)

Only PCBuild (vs9) was really tested.
Changes for older compilers were done manually.

Added Py_BUILD_CORE_MODULES macro to set WINVER and NTDDI_VERSION to Windows 2000 for core modules, too
Added -d option to build.bat (same as -c Debug) and fixed warning about /build option
Updated Windows related readme.txt files

Added ExpandEnvironmentStrings to the _winreg module.

based on the VS 2008 build directory to PC/VS8.0. The script
PCbuild/vs8to9.py was added to sync changes from PCbuild to PC/VS8.0.

Kristjan, the initial creator of the PCbuild8 directory is fine with the replacement. I've moved the new version of the VS 2005 build directory next to the other legacy build directories. The new sync script is based on the work of wreck and syncs changes in the project, property and solution files.

The patch unifies float("inf") and repr(float("inf")) on all platforms.

Added wide char api variants of getch and putch to msvcrt module. The wide char methods are required to fix #1578 in py3k. I figured out that they might be useful in 2.6, too.

* 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?