Updated the drivetrain control loop for this year.

Still need a couple unit tests, but the current test passes.
diff --git a/frc971/control_loops/drivetrain/drivetrain.gyp b/frc971/control_loops/drivetrain/drivetrain.gyp
new file mode 100644
index 0000000..84c4a3a
--- /dev/null
+++ b/frc971/control_loops/drivetrain/drivetrain.gyp
@@ -0,0 +1,70 @@
+{
+  'targets': [
+    {
+      'target_name': 'drivetrain_loop',
+      'type': 'static_library',
+      'sources': ['drivetrain.q'],
+      'variables': {
+        'header_path': 'frc971/control_loops/drivetrain',
+      },
+      'dependencies': [
+        '<(AOS)/build/aos.gyp:libaos',
+        '<(AOS)/common/common.gyp:control_loop_queues',
+        '<(AOS)/common/common.gyp:queues',
+      ],
+      'export_dependent_settings': [
+        '<(AOS)/build/aos.gyp:libaos',
+        '<(AOS)/common/common.gyp:control_loop_queues',
+        '<(AOS)/common/common.gyp:queues',
+      ],
+      'includes': ['../../../aos/build/queues.gypi'],
+    },
+    {
+      'target_name': 'drivetrain_lib',
+      'type': 'static_library',
+      'sources': [
+        'drivetrain.cc',
+        'drivetrain_motor_plant.cc',
+      ],
+      'dependencies': [
+        '<(AOS)/build/aos.gyp:libaos',
+        'drivetrain_loop',
+        '<(AOS)/common/common.gyp:controls',
+        '<(DEPTH)/frc971/frc971.gyp:common',
+        '<(DEPTH)/frc971/control_loops/control_loops.gyp:state_feedback_loop',
+        '<(DEPTH)/frc971/queues/queues.gyp:queues',
+      ],
+      'export_dependent_settings': [
+        '<(DEPTH)/frc971/control_loops/control_loops.gyp:state_feedback_loop',
+        '<(AOS)/common/common.gyp:controls',
+        'drivetrain_loop',
+      ],
+    },
+    {
+      'target_name': 'drivetrain_lib_test',
+      'type': 'executable',
+      'sources': [
+        'drivetrain_lib_test.cc',
+      ],
+      'dependencies': [
+        '<(EXTERNALS):gtest',
+        'drivetrain_loop',
+        'drivetrain_lib',
+        '<(AOS)/common/common.gyp:queue_testutils',
+        '<(DEPTH)/frc971/control_loops/control_loops.gyp:state_feedback_loop',
+      ],
+    },
+    {
+      'target_name': 'drivetrain',
+      'type': 'executable',
+      'sources': [
+        'drivetrain_main.cc',
+      ],
+      'dependencies': [
+        '<(AOS)/atom_code/atom_code.gyp:init',
+        'drivetrain_lib',
+        'drivetrain_loop',
+      ],
+    },
+  ],
+}