Added shooter and tests.

Added the shooter into the main superstructure and added tests.

Change-Id: I6c9afe3c74a08251854805050c40fafdca90fba8
diff --git a/y2020/control_loops/superstructure/BUILD b/y2020/control_loops/superstructure/BUILD
index 87ee689..de15415 100644
--- a/y2020/control_loops/superstructure/BUILD
+++ b/y2020/control_loops/superstructure/BUILD
@@ -63,6 +63,7 @@
         "//aos/controls:control_loop",
         "//aos/events:event_loop",
         "//y2020:constants",
+        "//y2020/control_loops/superstructure/shooter",
     ],
 )
 
@@ -102,6 +103,7 @@
         "//frc971/control_loops/drivetrain:drivetrain_status_fbs",
         "//y2020/control_loops/superstructure/hood:hood_plants",
         "//y2020/control_loops/superstructure/intake:intake_plants",
+        "//y2020/control_loops/superstructure/shooter:shooter_plants",
     ],
 )