Send frames out on the queue

This also required passing the camera index through the Teensy.

Change-Id: I73d380a01fd129919dba5ccfa04e41b0f02da767
diff --git a/y2019/vision/target_sender.cc b/y2019/vision/target_sender.cc
index ad42ce4..5f2afb9 100644
--- a/y2019/vision/target_sender.cc
+++ b/y2019/vision/target_sender.cc
@@ -334,7 +334,7 @@
 
     // TODO: Select top 3 (randomly?)
 
-    frc971::jevois::Frame frame{};
+    frc971::jevois::CameraFrame frame{};
 
     for (size_t i = 0; i < results.size() && i < frame.targets.max_size();
          ++i) {