Implemented 5th order gaussian quadrature.

Change-Id: Id7023b4f175c60b6930b5cb8aa829636604b2d25
diff --git a/frc971/control_loops/BUILD b/frc971/control_loops/BUILD
index a25a2e8..3cc8dd3 100644
--- a/frc971/control_loops/BUILD
+++ b/frc971/control_loops/BUILD
@@ -202,6 +202,24 @@
     ],
 )
 
+cc_library(
+    name = "fixed_quadrature",
+    hdrs = [
+        "fixed_quadrature.h",
+    ],
+)
+
+cc_test(
+    name = "fixed_quadrature_test",
+    srcs = [
+        "fixed_quadrature_test.cc",
+    ],
+    deps = [
+        ":fixed_quadrature",
+        "//aos/testing:googletest",
+    ],
+)
+
 queue_library(
     name = "profiled_subsystem_queue",
     srcs = [