title: 2 different animations for next/prev slide with ng-animate
body: <p>In my case, <code>ng-view</code> is a slider that has arrows to show the next template and the previous template. Currently it has one type of animation for the transition between templates.</p>
  
  <pre><code>&lt;div data-ng-view data-ng-animate="{enter: 'slide-forward-enter', leave: 'slide-forward-leave'}"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>I want to extend the behaviour to do different animations depending on which arrow is clicked. Click on the "Next" arrow should perform <code>slide-forward-enter</code> &amp; <code>slider-forward-leave</code> animation, while click on the "Previous" arrow should perform <code>slide-reverse-enter</code> &amp; <code>slider-reverse-leave</code>.</p>
  
  <p>How to achieve this?</p>