Implement superstructure class and tests

Change-Id: If5a2a296ada3dd625ad7eb74af106b36b36ab932
diff --git a/y2019/BUILD b/y2019/BUILD
index 576cf6c..44c9e9c 100644
--- a/y2019/BUILD
+++ b/y2019/BUILD
@@ -23,11 +23,12 @@
         "//aos/mutex",
         "//aos/network:team_number",
         "//frc971:constants",
+        "//frc971/control_loops:static_zeroing_single_dof_profiled_subsystem",
         "//y2019/control_loops/drivetrain:polydrivetrain_plants",
         "//y2019/control_loops/superstructure/elevator:elevator_plants",
+        "//y2019/control_loops/superstructure/wrist:wrist_plants",
         "//y2019/control_loops/superstructure/intake:intake_plants",
         "//y2019/control_loops/superstructure/stilts:stilts_plants",
-        "//y2019/control_loops/superstructure/wrist:wrist_plants",
     ],
 )