[ardour-dev] latest CVS commit

[Paul Davis]

  * resurrect the error log window, with some redesigns
  * panning link buttons say "linked" all the time, and use
      color/appearance to convey "on" (like solo/mute)
  * redirects (plugins, inserts, sends) can now be renamed
  * fix buglet in Region::set_muted()
  * fix problem with duplicate PunchIn event 
  
  libgtkmmext: 5.8.1
  ardour/gtk:  0.510.0
  libardour:   0.809.2