newsfeed route

  newsfeed: function () {
    // save current mainpanemodel
    a.mainpane.saveState();
    // we never fetch the newsfeed to get the latest stuff
    var feed = new Feed();
    feed.bind('load:finished', this.loadFinished, this);
    feed.bind('load:start', this.loadStart, this);
    feed.bind('load:end', this.loadEnd, this);
    feed.fetch();
    a.mainpane.addModel(feed, 0);
    a.viewer.addModel(null);
  },