title: How does ion-slides work on ionic 1.2.4 (Or does it work for 1.2.4?)
body: <p>I used the doc <a href="http://ionicframework.com/docs/nightly/api/directive/ionSlides/" rel="noreferrer">http://ionicframework.com/docs/nightly/api/directive/ionSlides/</a> and basically use the starter app template. I added the html to the template and the js part to my controller, but it gave out error ReferenceError: fade is not defined and shows nothing..</p>
  
  <p>Does anyone has a working ion-slides example for 1.2.4 ionic? My assumption is that they changed something but haven't produced the doc for it yet.</p>
  
  <p>Here is the code that I used, I added the js part to controller and the html to my view. </p>
  
  <pre class="lang-js prettyprint-override"><code>$scope.options = {
    loop: false,
    effect: fade,
    speed: 500,
  }
  $scope.data = {};
  $scope.$watch('data.slider', function(nv, ov) {
    $scope.slider = $scope.data.slider;
  })
  </code></pre>
  
  <pre class="lang-html prettyprint-override"><code>&lt;ion-slides  options="options" slider="data.slider"&gt;
    &lt;ion-slide-page&gt;
      &lt;div class="box blue"&gt;&lt;h1&gt;BLUE&lt;/h1&gt;&lt;/div&gt;
    &lt;/ion-slide-page&gt;
    &lt;ion-slide-page&gt;
      &lt;div class="box yellow"&gt;&lt;h1&gt;YELLOW&lt;/h1&gt;&lt;/div&gt;
    &lt;/ion-slide-page&gt;
    &lt;ion-slide-page&gt;
      &lt;div class="box pink"&gt;&lt;h1&gt;PINK&lt;/h1&gt;&lt;/div&gt;
    &lt;/ion-slide-page&gt;
  &lt;/ion-slides&gt;
  </code></pre>
  
  <p>When going into the view I received this error:</p>
  
  <pre><code>ReferenceError: fade is not defined
  at new (controllers.js:22)
  at invoke (ionic.bundle.js:17762)
  at Object.instantiate (ionic.bundle.js:17770)
  at ionic.bundle.js:22326
  at self.appendViewElement (ionic.bundle.js:56883)
  at Object.switcher.render (ionic.bundle.js:54995)
  at Object.switcher.init (ionic.bundle.js:54915)
  at self.render (ionic.bundle.js:56743)
  at self.register (ionic.bundle.js:56701)
  at updateView (ionic.bundle.js:62357)
  </code></pre>
  
  <p>I am using the example of the nightly version and my ionic version is 1.2.4</p>