Add an example controller for hardware switch test

examples/heckle/config/config.exs

@@ -0,0 +1,30 @@
+# This file is responsible for configuring your application
+# and its dependencies with the aid of the Mix.Config module.
+use Mix.Config
+
+config :heckle,
+  vlan_tagging:  true,
+  vlan_id:       123,
+  vlan_trunk:    "veth0",
+  access_port1:  "veth4",
+  access_port2:  "veth3",
+  receiver_mac:  "00000000000f",
+  receiver_ip:   {8,8,8,8},
+  sender_mac:    "001122334455",
+  inside_local:  {192,168,5,10},
+  outside_local: {192,168,255,1},
+  flow_pattern:  :bum
+
+config :tres,
+  protocol:        :tcp,
+  port:            6653,
+  max_connections: 10,
+  num_acceptors:   10,
+  callback_module: Heckle.Controller,
+  callback_args:   ["0000d2851d52d749"]
+
+config :logger,
+  level: :debug,
+  format: "$date $time [$level] $metadata$message\n",
+  metadata: [:application],
+  handle_otp_reports: true