title: Change font color of ion-title in ionic 2
body: <p>Hey I make a todo list app in ionic2, I have a sidebar list.
  In list.html I have the following code:</p>
  
  <pre><code>&lt;ion-navbar *navbar&gt;
    &lt;a menu-toggle&gt;
      &lt;icon menu&gt;&lt;/icon&gt;
    &lt;/a&gt;
    &lt;ion-title class="listTitle"&gt;My First List&lt;/ion-title&gt;
  &lt;/ion-navbar&gt;
  </code></pre>
  
  <p>I'm trying to change the color of "My First List" to white with the css. 
  but it's not working.
  Also I defined a background color for the title, but it overrides the menu icon. Why is that?</p>
  
  <p>The css:</p>
  
  <pre><code>.listTitle
  {
      background-color : #58B43F;
      color : #ffffff !important;
      box-shadow : 0px 6px 10px #888888;
  }
  </code></pre>
  
  <p>My expected result is that the navbar will be in green color with white title and white menu icon. How should I do that?</p>
  
  <p>Thanks.</p>