* README.win32
* config.h.win32: Add HAVE_WINTAB. Undefine it if bulding without
the Wintab SDK.
* gdk/win32/gdkinput.c: Hack some more. Still doesn't quite work
OK, but getting closer. Guard against bogus tilt data from Wacom
ArtPad II with the 3.40 driver. Add ifdefs for HAVE_WINTAB to
enable easier building without Wintab.
* gdk/win32/gdkinput.h
* gdk/win32/gdkevents.c
* gdk/win32/gdkwindow.c: Minor changes related related to above.
* gdk/win32/gdkvisual.c: Simplify a lot, remove leftovers from X11
code. As we have just one visual on Win32, no sense to have it in a
table, and no need for the hash table.
directory hierarchy like this, with common gdk.h and gdktypes.h
for all backends. gdkrectangles.c and gdkrgb.c is copied before
compilation from the x11 backed (which still is in .., but
eventually will be in ..\x11).
