Add the voltage and lateral accel curvature pass

We now have enough math here to now talk about the lateral acceleration
and the max velocity to only use a 12 volt battery.

Change-Id: I13330a1f164e751276c12c18cdc61b629d4295df
diff --git a/frc971/control_loops/python/BUILD b/frc971/control_loops/python/BUILD
index 09945ba..c0b71f7 100644
--- a/frc971/control_loops/python/BUILD
+++ b/frc971/control_loops/python/BUILD
@@ -108,6 +108,7 @@
         "//external:python-gflags",
         "//external:python-glog",
         "//frc971/control_loops/python:controls",
+        "//y2018/control_loops/python:polydrivetrain_lib",
         "@matplotlib",
     ],
 )