[ffgtk] (4 commits) ...Re-added libsndfile-devel requirement

[Louis Lagendijk]

Summary of changes:

  07d931c... New sources for 0.8.3 added (*)
  9012d11... New 0.8.3 upstream release (*)
  2db1744... Obsolete plugin-gstreamer (is dropped) and plugin-capifax ( (*)
  dc072d6... Re-added libsndfile-devel requirement (*)

(*) This commit already existed in another branch; no separate mail sent