title: (Sphero) robot sdk not working for 64 bit architecture and ios 8.2 in ios
body: <p>I've tried to get this project to build with no success. No code or project modifications just downloaded and tried to build. ios8.2 XCode 6.1.1 
  <a href="https://github.com/orbotix/Sphero-iOS-SDK/tree/Beta" rel="nofollow">https://github.com/orbotix/Sphero-iOS-SDK/tree/Beta</a></p>
  
  <p>Undefined symbols for architecture x86_64:
    "_OBJC_CLASS_$_RKConvenienceRobot", referenced from:
        objc-class-ref in HelloWorldViewController.o
    "_OBJC_CLASS_$_RKRobotDiscoveryAgent", referenced from:
        objc-class-ref in HelloWorldViewController.o
  ld: symbol(s) not found for architecture x86_64</p>