[ardour-dev] latest CVS commit

[Paul Davis]

   * removing a location marks the session dirty
   * several important fixes to prevent clicks and crackles during
       transport operations, event handling and more
   * make polarity work even during a declick
   * post-fader redirects get zeroed signal if gain is zero
   * gain control (fader) now operational during recording
   * automation gain playback during recording possible
   * libardour: 0.896.2