title: backbone.marionette region and layout
body: <p>is there a way to specify a template for marionette region?
  right now i'm using the layout object to specify a template.</p>
  
  <pre><code> AppLayout = Backbone.Marionette.Layout.extend({
  
       template: tmpl
  
      });
  
      var layout = new AppLayout();
      App.main.show(layout);
  
      App.addRegions({
          userInfo: "#userInfo",
          mainMenu: "#mainMenu",
          content: "#content"
      });
  
      App.mainMenu.show(new mainMenuView.Views.menu());
      App.content.show(new dashboard.Views.main());    
  </code></pre>
  
  <p>why i cannot get access directly from my app object to my regions, when i define them inside the layout object?</p>
  
  <pre><code> AppLayout = Backbone.Marionette.Layout.extend({
  
       template: tmpl
       regions: {
           userInfo: "#userInfo",
          mainMenu: "#mainMenu",
          content: "#content"
        }
      });
  
      var layout = new AppLayout();
      App.main.show(layout);
  
      does not work:
      App.mainMenu.show(new mainMenuView.Views.menu());
      App.content.show(new dashboard.Views.main());    
  </code></pre>
  
  <p>Thanks</p>