title: Vertical swipe/drag gesture in ionic 2
body: <p>I need to use the swipeup/swipedown gestures in an Ionic 2 application. When I do </p>
  
  <pre><code>&lt;div (swipe)='someFunction($event)'&gt;&lt;/div&gt;
  </code></pre>
  
  <p>Then my <em><code>someFunction(e)</code></em> is being called, but only on <strong>horizontal</strong> slides -- therefore I'm unable to listen to swipes in up and down directions. <em><code>(swipeup)</code></em> and <em><code>(swipedown)</code></em> seem not to do anything at all. Do you have any idea whether this is possible at all with the Ionic beta?</p>