title: xcglogger via cocoapods results in No Such Module
body: <p>caveat: new to cocoapods...
  I have a swift xcode project and I'm trying to use the XCGLogger pod, but after adding it to the podfile, (with use_frameworks! ), pod install -- everything looks good:</p>
  
  <p><img src="https://i.stack.imgur.com/BzcQn.png" alt="enter image description here"></p>
  
  <p>but when I put the import XCGLogger in my appdelegate, the compiler tells me No such module: XCGLogger.</p>
  
  <pre><code>import UIKit
  import Crashlytics
  import XCGLogger
  </code></pre>
  
  <p>What could I have done wrong (this time:) ?</p>
  
  <p>thanks!</p>