Turret Messages

Add Turret flat buffer messages to the main superstructure tables.

Change-Id: I4390f59e3db9623af0cec1f330943595883b60f3
diff --git a/y2020/control_loops/superstructure/superstructure_output.fbs b/y2020/control_loops/superstructure/superstructure_output.fbs
index e887cf5..abb15dc 100644
--- a/y2020/control_loops/superstructure/superstructure_output.fbs
+++ b/y2020/control_loops/superstructure/superstructure_output.fbs
@@ -9,6 +9,10 @@
 
   // Voltage sent to rollers on intake. Positive rolls inward.
   intake_roller_voltage:double;
+
+  //Voltage sent to the motors.
+  //Positive rotates counterclockwise from a birds eye view.
+  turret_voltage:double;
 }
 
 root_type Output;