Added interpolated bottom of the target angle.

Change-Id: I88483985afcffcfc887e8c531bc08ce16a553b9e
diff --git a/y2016/vision/vision.q b/y2016/vision/vision.q
index a0d021c..872c9ae 100644
--- a/y2016/vision/vision.q
+++ b/y2016/vision/vision.q
@@ -20,6 +20,8 @@
   double vertical_angle;
   // Distance to the target in meters.
   double distance;
+  // The angle in radians of the bottom of the target.
+  double angle;
 
   // Capture time of the angle using the clock behind Time::Now().
   int64_t target_time;