Update bot3 drivetrain and get defense bot working.

Change-Id: I0e3d5c0e768ee77eaeaf0a963f15c3172389ea6e
diff --git a/y2014_bot3/control_loops/python/BUILD b/y2014_bot3/control_loops/python/BUILD
index bb8dc29..756b60e 100644
--- a/y2014_bot3/control_loops/python/BUILD
+++ b/y2014_bot3/control_loops/python/BUILD
@@ -6,7 +6,21 @@
     'drivetrain.py',
   ],
   deps = [
+    '//external:python-gflags',
     '//external:python-glog',
     '//frc971/control_loops/python:controls',
   ]
 )
+
+py_binary(
+  name = 'polydrivetrain',
+  srcs = [
+    'polydrivetrain.py',
+    'drivetrain.py',
+  ],
+  deps = [
+    '//external:python-gflags',
+    '//external:python-glog',
+    '//frc971/control_loops/python:controls',
+  ],
+)