Does not build

[Joshfindit]

After resolving "cannot find" errors, this was the first compile problem:

AppRTCDemo-Ocean-master/AppRTCDemo/APPRTCAppDelegate.m:52:32: No visible @interface for 'APPRTCViewController' declares the selector 'applicationWillResignActive:'

Commenting out applicationWillResignActive brings this next:

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_RTCPeerConnectionFactory", referenced from:
      objc-class-ref in APPRTCAppDelegate.o
ld: symbol(s) not found for architecture arm64

Xcode 6.1