title: Setting platform specific icons in Ionic
body: <p>Okay, so this might be either a really simple question and I'll come away feeling sheepish but I've just gotten started using Ionic and I'm just playing around with detailing the UI with icons.</p>
  
  <p>My question is whether or not you can set the icons in an element and have them render differently depending on which platform you build for?</p>
  
  <p>For example, I had a menu item like so</p>
  
  <pre><code>&lt;ion-content scroll="false"&gt;
    &lt;ul class="list"&gt;
      &lt;li class="item"&gt;&lt;a href="#/login"&gt;&lt;i class="icon ion-locked"&gt;Login&lt;/a&gt;&lt;/li&gt; 
    &lt;/ul&gt; 
  &lt;/ion-content&gt;
  </code></pre>
  
  <p>In Ionicons, there is a <code>ion-locked</code> icon for both android (<code>ion-android-locked</code>) and ios (<code>ion-ios-locked</code>)and I was wondering if there is a way to set icons to match their platform during the build process?</p>
  
  <p>It may just be that I end up having seperate branches in git for this, but I'd rather not if there is a simple way to implement this?</p>