Win32 portability changes:

* config.h.win32, README.win32: Small changes.

	* tools/pdbgen/pdb/*.pdb: Include <string.h>.

	* app/*_cmds.c: Autogenerated files reflect above changes.

	* libgimp/makefile.msc app/makefile.msc: Various updates,
 	including new object files. Gtk+ directory now should be called
 	gtk+ (not gtk-plus). Use win32-specific gdk subdir. Glib directory
 	now should be called just glib.

	* libgimp/gimp.def: Updates.

	* libgimp/gimpfeatures.h.win32: Made current with
 	gimpfeatures.h.in.

	* libgimp/gimpfileselection.c: Define S_ISDIR and S_ISREG if
 	necessary.

	* tools/pdbgen/pdb/fileops.pdb: Must have a
 	statement (even an empty one) after a label.

	* app/fileops_cmds.c: Autogenerated file reflects above changes.

	* app/crop.c: Include <string.h>.

	* app/{app_procs,batch,fileops,datafiles,errorconsole,general,
 	plug_in,temp_buf,tile_swap}.c: Test NATIVE_WIN32, not
 	_MSC_VER. (NATIVE_WIN32 means we are using the Microsoft C
 	runtime, even if we might be compiling with gcc.)

	* app/fileops.c: Don't include <process.h> here.

	* app/fileops.h: Do include <process.h> here.

	* app/gimpparasite.c: Include config.h, guard inclusion of
 	<unistd.h>. (Is the inclusion of unistd.h in source files all over
 	the place really necessary?)

	* app/ink.c: MSC doesn't handle conversion from unsigned __int64
 	to double, so cast to signed.

	* app/lut_funcs.c: Include config.h, and define rint() if necessary.

	* app/pixel_processor.c: Include config.h without "..", like in
 	all the other places. Include <string.h>

	* app/text_tool.c: Guard the "POINTS" identifier that clashes with
 	<windows.h>, sigh.

libgimpbase/gimpdatafiles.c

@@ -32,7 +32,7 @@
 #include <dirent.h>
 #endif
 
-#ifdef _MSC_VER
+#ifdef NATIVE_WIN32
 #ifndef S_ISDIR
 #define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
 #define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)