* Fixed the hash in PulseAudio: I updated the name/version, but forgot
to update the hash. So secretly it was still building the old
version. Also, now that we've realised that the PulseAudio server
and library don't need to be the same build, disable some
dependencies by default (avahi and bluez).
svn path=/nixpkgs/branches/kde-4.7/; revision=28023