===== TODO =====

  * GTK3 Port (100%, see Bug [[https://bugzilla.xfce.org/show_bug.cgi?id=12683|#12683]])
  * Replace gstreamer-plugins-base-0.10 (0%, see Bugs [[https://bugzilla.xfce.org/show_bug.cgi?id=10120|#10120]], [[https://bugzilla.xfce.org/show_bug.cgi?id=11619|#11619]], and [[https://bugzilla.xfce.org/show_bug.cgi?id=14140|#14140]])
    * WIP implementation of multiple backends: https://git.xfce.org/users/ali/xfce4-mixer/log/?h=various-backends-impl