Add "arbtt" along with its Haskell dependencies.
Add perl Text::BibTeX, along with Config::AutoConf and ExtUtils::LibBuilder.
haskell: Add alsa-core, alsa-pcm, ix-shapable, carray and sample-frame.

Conflicts (trivial):
	pkgs/top-level/haskell-packages.nix
lilypond: Update to 2.16.2, fix guile.