Add a PlatformToolset tag for each configuration for project files that
do not yet have them. This is to ease support for Visual Studio 2012 as
we can copy and easily replace a few items with automated scripts as
project files for Visual Studio 2010 and 2012 are very similar.
This might change when we eventually support the Metro (aka Windows 8
Modern UI), but this will suffice for the time being.
Add Windows .bat and Python script to call g-ir-scanner to build
introspection files for Visual Studio builds. This will read from the
autotools files using Python REGEX functionality to determine the headers
and sources for g-ir-scanner to process, so the autotools files will not
need to be updated except to distribute the necessary files. Thils will
also enable one to build introspection files on Windows without using a
BASH-style shell such as MSYS.
Also add an utility Visual Studio project to call the Windows .bat to
build the introspection files for GTK+/GDK, for convenience.
