Adds third robot drivetrain and python files

Change-Id: I9fd85d28478054fe66b152e68b50ff567e9811e2
diff --git a/y2018_bot3/control_loops/drivetrain/BUILD b/y2018_bot3/control_loops/drivetrain/BUILD
new file mode 100644
index 0000000..19edec6
--- /dev/null
+++ b/y2018_bot3/control_loops/drivetrain/BUILD
@@ -0,0 +1,73 @@
+load('//aos/build:queues.bzl', 'queue_library')
+
+genrule(
+  name = 'genrule_drivetrain',
+  cmd = '$(location //y2018_bot3/control_loops/python:drivetrain) $(OUTS)',
+  tools = [
+    '//y2018_bot3/control_loops/python:drivetrain',
+  ],
+  outs = [
+    'drivetrain_dog_motor_plant.h',
+    'drivetrain_dog_motor_plant.cc',
+    'kalman_drivetrain_motor_plant.h',
+    'kalman_drivetrain_motor_plant.cc',
+  ],
+)
+
+genrule(
+  name = 'genrule_polydrivetrain',
+  cmd = '$(location //y2018_bot3/control_loops/python:polydrivetrain) $(OUTS)',
+  tools = [
+    '//y2018_bot3/control_loops/python:polydrivetrain',
+  ],
+  outs = [
+    'polydrivetrain_dog_motor_plant.h',
+    'polydrivetrain_dog_motor_plant.cc',
+    'polydrivetrain_cim_plant.h',
+    'polydrivetrain_cim_plant.cc',
+  ],
+)
+
+cc_library(
+  name = 'polydrivetrain_plants',
+  srcs = [
+    'polydrivetrain_dog_motor_plant.cc',
+    'drivetrain_dog_motor_plant.cc',
+    'kalman_drivetrain_motor_plant.cc',
+  ],
+  hdrs = [
+    'polydrivetrain_dog_motor_plant.h',
+    'drivetrain_dog_motor_plant.h',
+    'kalman_drivetrain_motor_plant.h',
+  ],
+  deps = [
+    '//frc971/control_loops:state_feedback_loop',
+  ],
+)
+
+cc_library(
+  name = 'drivetrain_base',
+  srcs = [
+    'drivetrain_base.cc',
+  ],
+  hdrs = [
+    'drivetrain_base.h',
+  ],
+  deps = [
+    ':polydrivetrain_plants',
+    '//frc971/control_loops/drivetrain:drivetrain_config',
+    '//frc971:shifter_hall_effect',
+  ],
+)
+
+cc_binary(
+  name = 'drivetrain',
+  srcs = [
+    'drivetrain_main.cc',
+  ],
+  deps = [
+    ':drivetrain_base',
+    '//aos/linux_code:init',
+    '//frc971/control_loops/drivetrain:drivetrain_lib',
+  ],
+)