Drive code works on Tantrum.

Need to write the spring code.  Drive now supports doubles...  What a
pain.

Change-Id: Id589acdc443dcd81242a21e3b0c26f81d6974dc8
diff --git a/aos/input/drivetrain_input.h b/aos/input/drivetrain_input.h
index 86b0e10..e38320c 100644
--- a/aos/input/drivetrain_input.h
+++ b/aos/input/drivetrain_input.h
@@ -59,7 +59,8 @@
   // Constructs the appropriate DrivetrainInputReader.
   static std::unique_ptr<DrivetrainInputReader> Make(
       InputType type,
-      const ::frc971::control_loops::drivetrain::DrivetrainConfig &dt_config);
+      const ::frc971::control_loops::drivetrain::DrivetrainConfig<double>
+          &dt_config);
 
   // Processes new joystick data and publishes drivetrain goal messages.
   void HandleDrivetrain(const ::aos::input::driver_station::Data &data);