Add an example controller for hardware switch test

examples/heckle/mix.exs

@@ -0,0 +1,22 @@
+defmodule Heckle.Mixfile do
+  use Mix.Project
+
+  @tres_path "../../../tres"
+
+  def project do
+    [app: :heckle,
+     version: "0.1.0",
+     elixir: "~> 1.5",
+     start_permanent: Mix.env == :prod,
+     deps: deps()]
+  end
+
+  def application do
+    [extra_applications: [:logger, :tres],
+     mod: {Heckle.Application, []}]
+  end
+
+  defp deps do
+    [{:tres, path: @tres_path}]
+  end
+end