Made new motor work

-Calibrate resistance, inductance, and Kv (also, we never committed the
    Python calibrations for the old motor).
-Fix feedback term--we were comparing a current to the commanded current
    corresponding to the cycle after it, which could've been an issue.
-Add some more debugging code that is useful when calibrating the motor.
-Increase baud rate of ITM to 128k
-Increase motor braking current to 100A from 80A
-Use measured current instead of goal current on fuse monitoring--should
    cause it to perform better in situations where we track poorly (e.g.,
    near full speed).

Change-Id: I1b5ff71b42323cb96f229c70821e9e0860ac4e4c
diff --git a/motors/big/motor_controls.h b/motors/big/motor_controls.h
index aae97d0..5c59ef1 100644
--- a/motors/big/motor_controls.h
+++ b/motors/big/motor_controls.h
@@ -51,11 +51,16 @@
     return static_cast<int16_t>(I_last_[ii] * 10.0f);
   }
 
+  float overall_measured_current() const override {
+    return overall_measured_current_;
+  }
+
  private:
   const ComplexMatrix<3, 1> E1Unrotated_, E2Unrotated_;
 
   float estimated_velocity_ = 0;
   float filtered_current_ = 0;
+  float overall_measured_current_ = 0;
 
   ::Eigen::Matrix<float, 3, 1> I_last_ = ::Eigen::Matrix<float, 3, 1>::Zero();