Add taglib to project to get extra cover data(and possibly replace libgroove for this function). Remove oggs from accepted files until I can figure out cover data for them better. Add non-persisted field for this to audiotrack object and method to add this data to it in memory.

src/GroovePlayer.h

@@ -72,6 +72,7 @@ private:
     void removeOrphanedTracks(Wt::Dbo::Session* session);
     
     AudioTrack getCurrentTrack(Wt::Dbo::Session* session);
+    void getPictureFromTrack(AudioTrack* trackToFill);
     
 };