[vtkusers] QVTKWidget with Qt 4.0.0

[Clinton Stimpson]

I'm currently working to finish the Qt 4.0 support.  I had it working 
just fine with beta snapshots of Qt4.  Trolltech changed build related 
stuff and designer plugin stuff with their final release.

>
>If you can get the QVTKWidget to actually *run* without crashing
>complaining about a QPaintDevice, please let me know
>(<http://public.kitware.com/pipermail/vtkusers/2005-July/081083.html>).
>  
>
Looks like you are mixing QtCore4.dll and Qt4Cored4.dll  (release/debug) 
libs in the same application.
Pay attention to which of the two you build QVTK with and which of the 
two you build your app with.

Clint