Updated constants and wpilib_interface.

Updated wpilib_interface and the constants files to have the
superstructure components.

Updated the linear_system codegen to output free speed in radians.
Updated the intake python file with the correct gear ratio.
Created the superstructure plants.

Change-Id: I5a2b54fe3de8d9ae9b0f79820465a2f97baed22d
diff --git a/y2019/control_loops/superstructure/stilts/BUILD b/y2019/control_loops/superstructure/stilts/BUILD
new file mode 100644
index 0000000..6beea39
--- /dev/null
+++ b/y2019/control_loops/superstructure/stilts/BUILD
@@ -0,0 +1,32 @@
+package(default_visibility = ["//y2019:__subpackages__"])
+
+genrule(
+    name = "genrule_stilts",
+    outs = [
+        "stilts_plant.h",
+        "stilts_plant.cc",
+        "integral_stilts_plant.h",
+        "integral_stilts_plant.cc",
+    ],
+    cmd = "$(location //y2019/control_loops/python:stilts) $(OUTS)",
+    tools = [
+        "//y2019/control_loops/python:stilts",
+    ],
+)
+
+cc_library(
+    name = "stilts_plants",
+    srcs = [
+        "stilts_plant.cc",
+        "integral_stilts_plant.cc",
+    ],
+    hdrs = [
+        "stilts_plant.h",
+        "integral_stilts_plant.h",
+    ],
+    visibility = ["//visibility:public"],
+    deps = [
+        "//frc971/control_loops:hybrid_state_feedback_loop",
+        "//frc971/control_loops:state_feedback_loop",
+    ],
+)