Add interpolation table to y2017 constants

The next patch will make use of this for determining the actual hood
and turret angles.

Change-Id: I9f956306b5795652148cdfbbe588c598d9c72a43
diff --git a/y2017/constants.h b/y2017/constants.h
index 1d6eede..c6aa70c 100644
--- a/y2017/constants.h
+++ b/y2017/constants.h
@@ -5,6 +5,7 @@
 #include <math.h>
 
 #include "frc971/constants.h"
+#include "frc971/shooter_interpolation/interpolation.h"
 
 #include "y2017/control_loops/drivetrain/drivetrain_dog_motor_plant.h"
 #include "y2017/control_loops/superstructure/column/column_plant.h"
@@ -125,6 +126,8 @@
   const char *vision_name;
 
   double vision_error;
+
+  ::frc971::shooter_interpolation::InterpolationTable shot_interpolation_table;
 };
 
 // Creates (once) a Values instance for ::aos::network::GetTeamNumber() and