Update Unity example (also, remove dll, need to do that a better way)

examples/button-clicker/Assets/DiscordController.cs

@@ -71,7 +71,7 @@ public class DiscordController : MonoBehaviour
     public void RequestCallback(DiscordRpc.JoinRequest request)
     {
         ++callbackCalls;
-        Debug.Log(string.Format("Discord: join request {0}: {1}", request.username, request.userId));
+        Debug.Log(string.Format("Discord: join request {0}#{1}: {2}", request.username, request.discriminator, request.userId));
         onJoinRequest.Invoke(request);
     }