title: GLKMatrix4 (and other similar) missing in swift?
body: <p>I'm having an issue creating a 4X4 openGL matrix in swift. I have imported the following which worked in Obj-C:</p>
  
  <pre><code>import UIKit
  import GLKit
  import OpenGLES
  </code></pre>
  
  <p><code>GLKMatrix4</code> is not available, however I have access to other GL math resources, <code>GLKMathDegreesToRadians()</code> for instance. </p>
  
  <p>Has anyone else run into this issue?</p>