binary package downloading/extraction (prebuilt contribs)

### Missing software for MacOSX

# 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