title: What should my compileSdkVersion be to compile a Google Glass app on XE16?
body: <p>I'm getting errors related to an issue with my app having been compiled on an earlier version. In Android Studio I was using 'compileSdkVersion "Google Inc.:Glass Development Kit Sneak Peek:15"' in my build.gradle but after trying to send an app to my device I'm getting:</p>
  
  <pre><code>    4277-4277/com.myapp.app E/AndroidRuntime﹕ FATAL EXCEPTION: main
  Process: com.myapp.app, PID: 4277
  java.lang.NoClassDefFoundError: com.google.android.glass.timeline.TimelineManager
  </code></pre>