Tune drivetrain.

Add force knob, efficiency, IMU

Change-Id: I4fd12665490d4e535d5890c2edf8ae611938333d
diff --git a/y2014/control_loops/drivetrain/drivetrain_base.cc b/y2014/control_loops/drivetrain/drivetrain_base.cc
index b43323b..2083a24 100644
--- a/y2014/control_loops/drivetrain/drivetrain_base.cc
+++ b/y2014/control_loops/drivetrain/drivetrain_base.cc
@@ -18,6 +18,7 @@
       ::frc971::control_loops::drivetrain::ShifterType::HALL_EFFECT_SHIFTER,
       ::frc971::control_loops::drivetrain::LoopType::CLOSED_LOOP,
       ::frc971::control_loops::drivetrain::GyroType::SPARTAN_GYRO,
+      ::frc971::control_loops::drivetrain::IMUType::IMU_X,
 
       ::y2014::control_loops::drivetrain::MakeDrivetrainLoop,
       ::y2014::control_loops::drivetrain::MakeVelocityDrivetrainLoop,
diff --git a/y2014/control_loops/python/drivetrain.py b/y2014/control_loops/python/drivetrain.py
index 77e8254..e8fdb56 100755
--- a/y2014/control_loops/python/drivetrain.py
+++ b/y2014/control_loops/python/drivetrain.py
@@ -20,6 +20,7 @@
                                           q_pos_high = 0.12,
                                           q_vel_low = 1.0,
                                           q_vel_high = 1.0,
+                                          has_imu = False,
                                           dt = 0.005,
                                           controller_poles = [0.7, 0.7])