Add data examples in examples/basic and in README about iron-router HOT 3 CLOSED

MyController = RouteController.extend({
  data: function () {
    // data can be a function. thisArg is the controller instance so you can access params. This function will get called when you call render on the controller.
    return Posts.findOne({_id: this.params._id});
  }
});

MyController = RouteController.extend({
  run: function () {
    this.render('myTemplate', {
      data: function () {
        // pass the data function as an option to render. Useful for overriding data functions when rendering into named yields.
        return Posts.findOne({_id: this.params._id});
      }
    });
  }
});

MyController = RouteController.extend({
  data: {
    posts: function () {
      // this won't get evaluated until the template that uses it calls this function.
      // so can be used to achieve reactivity at sub-template levels.
      return Posts.find();
    }
  }
});