[ardour-dev] latest CVS commit

[Paul Davis]

   * make creation of inputs and outputs
        "atomic" when creating tracks+busses
   * call gdk_flush() to try to force the splash
        screen onto the window ASAP
   * dragging playhead no longer breaks play state
   * autoreturn sort-of-works with JACK sync, its
        just a bit slow and visually jerky
   * fix for limit on number of curve points allowed
        in a canvas object

   * ardour/gtk: 0.518.1
      libardour: 0.819.0