Add ball detector and only intake if we have a ball.

Change-Id: Id72dde414d6dcddd8721056efdee3e5f25900a3a
diff --git a/y2016/queues/BUILD b/y2016/queues/BUILD
index 3b282fd..81f75d4 100644
--- a/y2016/queues/BUILD
+++ b/y2016/queues/BUILD
@@ -3,6 +3,13 @@
 load('/aos/build/queues', 'queue_library')
 
 queue_library(
+  name = 'ball_detector',
+  srcs = [
+    'ball_detector.q',
+  ],
+)
+
+queue_library(
   name = 'profile_params',
   srcs = [
     'profile_params.q',