title: Styling md-tooltip (Angular Material 1.1.3)
body: <p>I have a mat-tooltip that I was styling through a CSS like this:</p>
  
  <pre><code>mat-tooltip .mat-content {
      // custom values, styling is not applied
  }
  </code></pre>
  
  <p>However since 1.1.2 release of angular material this styling is not being applied to my tooltips. Has anybody encountered a similar issue?</p>