Apparently time_t is used in gtkrecentmanager.h, which is a special type
that could not be recognized when Gtk-3.0.gir is built. Judging from the
ast.py from the gobject-introspection package, we can define time_t as
long, and this will allow pygobject to load the Gtk module from
gi.repository.
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.
