Add Climber class and tests

For now, it is a simple pass through.

Change-Id: I5274b03f6ade23fbc98713cf8ed849866a85b429
diff --git a/y2020/control_loops/superstructure/superstructure_goal.fbs b/y2020/control_loops/superstructure/superstructure_goal.fbs
index bade51e..7cdc974 100644
--- a/y2020/control_loops/superstructure/superstructure_goal.fbs
+++ b/y2020/control_loops/superstructure/superstructure_goal.fbs
@@ -24,7 +24,7 @@
   // Positive = forward
   intake:frc971.control_loops.StaticZeroingSingleDOFProfiledSubsystemGoal;
 
-  //Positive is rollers intaking to Washing Machine.
+  // Positive is rollers intaking to Washing Machine.
   roller_voltage:float;
 
   // 0 = facing the front of the robot. Positive rotates counterclockwise.
@@ -49,7 +49,7 @@
   shooter_tracking:bool;
 
   // Positive is deploying climber and to climb; cannot run in reverse
-  climber_winch_voltage:double;
+  climber_voltage:float;
 }
 
 root_type Goal;