Don't automatically create a control track for each new track.

Timeline/Timeline.C

@@ -887,7 +887,8 @@ Timeline::handle ( int m )
                             Track *t = new Track( name );
 
                             Sequence *o = new Audio_Sequence( t );
-                            new Control_Sequence( t );
+
+//                            new Control_Sequence( t );
 
                             add_track( t );