Hi Guix,

This is a new version of my previous patch series towards Ardour.  The
attached patches replace (and partially repeat) those contained in the
following emails:

  * waf build system (unchanged):
    http://lists.gnu.org/archive/html/guix-devel/2015-01/msg00439.html

  * JACK2, aubio, liblo, LV2
    http://lists.gnu.org/archive/html/guix-devel/2015-01/msg00446.html

  * serd, sord, sratom, lilv, suil
    http://lists.gnu.org/archive/html/guix-devel/2015-01/msg00461.html

On top of that, the patch set adds the following packages:

  - Vamp SDK
  - LADSPA (a little ugly)
  - rubberband
  - libgnomecanvasmm (deprecated and old, but used by Ardour)
  - and finally: Ardour

I decided to replace the previous patches because of an error in the
'jack-2' package whose fix made it difficult to apply subsequent
patches.  Now everything is in context and the dependencies between the
patches is clearer now that Ardour has also been packaged.

~~ Ricardo