title: RubyMotion with CoreAnimation constant issue
body: <p>I'm trying to use some CATransition constants in my rubymotion app thusly:</p>
  
  <pre><code>transition = CATransition.animation
  transition.duration = 0.4
  transition.type = kCATransitionMoveIn
  transition.subtype = kCATransitionFromBottom
  </code></pre>
  
  <p>But am getting undefined local variable or method `kCATransitionMoveIn'. I've added quartzcore to frameworks in my rake file: </p>
  
  <p>app.frameworks += ['CoreLocation', 'MapKit', 'QuartzCore']</p>
  
  <p>Does anyone know why I can't access this constant? Thanks.</p>