2006-01-13  Aaron Bockover  <aaron@aaronbock.net>

    * src/PlayerInterface.cs: Request engine change before playing a song
    based on file extension; this will be used for falling back on GStreamer
    for some formats when using Helix as the primary engine

    * src/Preferences.cs: A restart is no longer needed to change the
    primary playback engine

    * src/Banshee.Base/IPlayerEngine.cs: Added SupportedExtensions property

    * src/Banshee.Base/PlayerEngineCore.cs: Allow switching engines from
    anything other than the primary based on file extension

    * src/Banshee.MediaEngine/Gstreamer/GstPlayerEngine.cs: claim to support
    WMA in SupportedExtensions as Helix/RP can't (better chance of it working
    in GStreamer than in Helix)

    * src/Banshee.MediaEngine/Vlc/VlcPlayerEngine.cs:
    * src/Banshee.MediaEngine/Helix/HelixPlayer.cs: Implement
    SupportedExtensions, but return null