contrib: update TODO, only OSX is left behind now

contrib/TODO

-### Missing software (present in old extras/contrib)
-
-qt4             -- needs automating, see http://people.videolan.org/~funman/win64/qt4-4.7.4-win64-bin.tar.bz2
-
-# Mac OSX
+### Missing software for MacOSX (was present in extras/contrib)
 
 # These 3 are binary framework downloads : no source code is used
 BGHUDAppKit
 Growl           -- last free version: 1.3.0: http://code.google.com/p/growl/source/list http://itunes.apple.com/us/app/growl/id467939042
 Sparkle
 
-vcdimager, cdio -- why are they used only in osx binaries, do we really need them?
+# disabled in win32 builds, we could do the same for OSX
+vcdimager (and dependancy cdio)
 
 build tools     -- (autotools, libtool, yasm...) see extras/tools