Tune drivetrain.

Add force knob, efficiency, IMU

Change-Id: I4fd12665490d4e535d5890c2edf8ae611938333d
diff --git a/y2017/control_loops/drivetrain/drivetrain_base.cc b/y2017/control_loops/drivetrain/drivetrain_base.cc
index bb22c0f..af3ff38 100644
--- a/y2017/control_loops/drivetrain/drivetrain_base.cc
+++ b/y2017/control_loops/drivetrain/drivetrain_base.cc
@@ -23,6 +23,7 @@
       ::frc971::control_loops::drivetrain::ShifterType::NO_SHIFTER,
       ::frc971::control_loops::drivetrain::LoopType::CLOSED_LOOP,
       ::frc971::control_loops::drivetrain::GyroType::IMU_Z_GYRO,
+      ::frc971::control_loops::drivetrain::IMUType::IMU_X,
 
       ::y2017::control_loops::drivetrain::MakeDrivetrainLoop,
       ::y2017::control_loops::drivetrain::MakeVelocityDrivetrainLoop,
diff --git a/y2017/control_loops/python/drivetrain.py b/y2017/control_loops/python/drivetrain.py
index b4635ee..74b114d 100755
--- a/y2017/control_loops/python/drivetrain.py
+++ b/y2017/control_loops/python/drivetrain.py
@@ -19,7 +19,8 @@
                                           q_pos_low = 0.12,
                                           q_pos_high = 0.14,
                                           q_vel_low = 1.0,
-                                          q_vel_high = 0.95)
+                                          q_vel_high = 0.95,
+                                          has_imu = False)
 
 def main(argv):
   argv = FLAGS(argv)