Refactor angular_system out of 2016 intake

Change-Id: I82272ea74b375861f8472e735fd489b431614ebe
diff --git a/frc971/control_loops/python/BUILD b/frc971/control_loops/python/BUILD
index 705aa38..f2eb9e9 100644
--- a/frc971/control_loops/python/BUILD
+++ b/frc971/control_loops/python/BUILD
@@ -145,3 +145,16 @@
         "@matplotlib",
     ],
 )
+
+py_library(
+    name = "angular_system",
+    srcs = ["angular_system.py"],
+    restricted_to = ["//tools:k8"],
+    visibility = ["//visibility:public"],
+    deps = [
+        ":controls",
+        "//aos/util:py_trapezoid_profile",
+        "//frc971/control_loops:python_init",
+        "@matplotlib",
+    ],
+)