Changed butterknife's constants to fix drivetrain.

Fixed test.

Change-Id: I1474ea42e2b613a9e87438a472159e7087669001
diff --git a/y2014_bot3/control_loops/python/drivetrain.py b/y2014_bot3/control_loops/python/drivetrain.py
index b0555a0..4c3577b 100755
--- a/y2014_bot3/control_loops/python/drivetrain.py
+++ b/y2014_bot3/control_loops/python/drivetrain.py
@@ -75,9 +75,9 @@
     # Mass of the robot, in kg.
     self.m = 37
     # Radius of the robot, in meters (requires tuning by hand)
-    self.rb = 0.601 / 2.0
+    self.rb = 0.45 / 2.0
     # Radius of the wheels, in meters.
-    self.r = 0.0508
+    self.r = 0.04445
     # Resistance of the motor, divided by the number of motors.
     self.resistance = 12.0 / self.stall_current
     # Motor velocity constant