Add drivetrain to y2017

Change-Id: I7494fd6c4b242ceb4aba26c9b5ddee064f29f382
diff --git a/y2017/control_loops/python/BUILD b/y2017/control_loops/python/BUILD
new file mode 100644
index 0000000..56a9f3d
--- /dev/null
+++ b/y2017/control_loops/python/BUILD
@@ -0,0 +1,39 @@
+package(default_visibility = ['//y2017:__subpackages__'])
+
+py_binary(
+  name = 'drivetrain',
+  srcs = [
+    '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',
+  ],
+)
+
+py_library(
+  name = 'polydrivetrain_lib',
+  srcs = [
+    'polydrivetrain.py',
+    'drivetrain.py',
+  ],
+  deps = [
+    '//external:python-gflags',
+    '//external:python-glog',
+    '//frc971/control_loops/python:controls',
+  ],
+)