Use a (mostly) hermetic Python interpreter
It still requires python to be installed on the host to run the wrapper
scripts, but it's close to being fully hermetic.
This also requires/enables the following changes, unfortunately all at
the same time:
* Use a downloaded f2py
* Use a downloaded scipy/numpy/matplotlib
* Fix a few things that don't run with the python version in their #!
* Stop using bazel-generated __init__.py files, because those interfere
with importing matplotlib nicely
Change-Id: Ife280464613d67cece9587b7d947f0b1d5466d7e
diff --git a/y2018/control_loops/BUILD b/y2018/control_loops/BUILD
new file mode 100644
index 0000000..57f2864
--- /dev/null
+++ b/y2018/control_loops/BUILD
@@ -0,0 +1,6 @@
+py_library(
+ name = "python_init",
+ srcs = ["__init__.py"],
+ visibility = ["//visibility:public"],
+ deps = ["//y2018:python_init"],
+)