2.21.3: * Add a sharing plugin using libepc * Add a Tracker-based video search plugin * Add the ability to select text subtitles for files in the UI * Port the mythtv plugin to using the TotemVideoList * Show a busy cursor when loading tracks from the YouTube plugin * Restore the previously active sidebar page when restarting Totem * Add the --no-existing-session argument to allow launching multiple instances of the Movie Player * Browser plugin: - Add support for compiling with xulrunner - Skip 0-length streams in playlists * GStreamer backend: - Add graphviz support