Add python model for 2019 elevator

Initial tuning as well.  Need to tune the mass for real though.

Change-Id: Id63693da4ffffb6937e6ec1dc597e3cec4625782
diff --git a/y2019/control_loops/python/BUILD b/y2019/control_loops/python/BUILD
index 90aafbc..9dddf12 100644
--- a/y2019/control_loops/python/BUILD
+++ b/y2019/control_loops/python/BUILD
@@ -55,3 +55,18 @@
     visibility = ["//visibility:public"],
     deps = ["//y2019/control_loops:python_init"],
 )
+
+py_binary(
+    name = "elevator",
+    srcs = [
+        "elevator.py",
+    ],
+    legacy_create_init = False,
+    restricted_to = ["//tools:k8"],
+    deps = [
+        ":python_init",
+        "//external:python-gflags",
+        "//external:python-glog",
+        "//frc971/control_loops/python:linear_system",
+    ],
+)