Create a nice general SimpleCappedStateFeedbackLoop

Change-Id: I79e686b1c6d689735b73634ccf9877e00bac4348
diff --git a/frc971/control_loops/BUILD b/frc971/control_loops/BUILD
index 26d00a5..5eeed1d 100644
--- a/frc971/control_loops/BUILD
+++ b/frc971/control_loops/BUILD
@@ -111,3 +111,14 @@
     '//aos/common:macros',
   ],
 )
+
+cc_library(
+  name = 'simple_capped_state_feedback_loop',
+  hdrs = [
+    'simple_capped_state_feedback_loop.h',
+  ],
+  deps = [
+    '//third_party/eigen',
+    ':state_feedback_loop',
+  ],
+)