[ardour-dev] latest CVS commit

[Paul Davis]

  * fix sends
      - they do not crash ardour (and/or system) when used
      - they start life with the same number of outs as their "parent"
        track
     
  * fix relative gain changes in mix groups

  * allow renaming of playlists
      - click "p" button of track controls, choose "rename" to rename
         current playlist
      - new and copy playlist operations pop up the rename dialog
         with the default new name present and selected

  * restore initial splash screen
  * don't save empty playlists into state file

  * libardour:  0.821.0
    ardour/gtk: 0.521.0