title: Ionic 2 : Use picture in tab button
body: <p>I use ion-tabs in my App and I want to use an picture in a tab-button. 
  I want to set this picture dynamicly. </p>
  
  <p>In my case, I have an account with different users linked to it. I want to change my tab picture depending of the selected user.</p>
  
  <p>I have this : </p>
  
  <p><a href="https://i.stack.imgur.com/d7fi1.png" rel="noreferrer"><img src="https://i.stack.imgur.com/d7fi1.png" alt="enter image description here"></a></p>
  
  <p>And i want this : </p>
  
  <p><a href="https://i.stack.imgur.com/sTgg6.png" rel="noreferrer"><img src="https://i.stack.imgur.com/sTgg6.png" alt="enter image description here"></a></p>
  
  <p>My code in my tabs :</p>
  
  <pre><code>    &lt;ion-tabs tabsHighlight="false"&gt;
        &lt;ion-tab [root]="HomePage" 
                 tabsHideOnSubPages="true"
                 tabIcon="checkbox"
                 tabTitle="A faire"
                 tabBadge="5"
                 tabBadgeStyle="notif"&gt;
        &lt;/ion-tab&gt;
        &lt;ion-tab [root]="ToComePage"
                 tabsHideOnSubPages="true"
                 tabIcon="time" tabTitle="A venir"
                 tabBadge="0"
                 tabBadgeStyle="notif"&gt;
        &lt;/ion-tab&gt;
        &lt;ion-tab [root]="HistoricPage"
                 tabsHideOnSubPages="true"
                 tabIcon="book"
                 tabTitle="Historique"&gt;
        &lt;/ion-tab&gt;
        &lt;ion-tab [root]="MenuPage"
                 tabsHideOnSubPages="true"
  //I want to delete this tab Icon and replace it by a picture.
                 tabIcon="menu"
                 tabTitle="Menu"&gt;
        &lt;/ion-tab&gt;
      &lt;/ion-tabs&gt;
  </code></pre>
  
  <p>I don't know how to do that, an idea ?</p>