Make setFlip() update the navigator

Makes setFlip() raise a bounds change, and makes the navigator copy
the image flip in addition to the other properties, when receiving
the bounds signal.

src/navigator.js

@@ -452,6 +452,7 @@ $.extend( $.Navigator.prototype, $.EventSource.prototype, $.Viewer.prototype, /*
         myItem.setWidth(bounds.width, immediately);
         myItem.setRotation(theirItem.getRotation(), immediately);
         myItem.setClip(theirItem.getClip());
+        myItem.setFlip(theirItem.getFlip());
     },
 
     // private

src/tiledimage.js

@@ -866,6 +866,7 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
     setFlip: function(flip) {
         this.flipped = !!flip;
         this._needsDraw = true;
+        this._raiseBoundsChange();
     },
 
     /**