Forgot __onShake method.

src/mixins/canvas_gestures.mixin.js

@@ -48,6 +48,16 @@
       this.fire('touch:orientation', {e: e, self: self});
     },
 
+    /**
+     * Method that defines actions when an Event.js shake event is detected.
+     *
+     * @param e Event object by Event.js
+     * @param self Event proxy object by Event.js
+     */
+    __onShake: function(e, self) {
+      this.fire('touch:shake', {e: e, self: self});
+    },
+
     /**
      * Scales an object by a factor
      * @param s {Number} The scale factor to apply to the current scale level