Added first attempt at mix.exs

mix.exs

@@ -0,0 +1,23 @@
+defmodule Eredis.Mixfile do
+  use Mix.Project
+
+  def project do
+    [
+      app: :eredis,
+      version: "1.1.0",
+      elixir: "~> 1.5.1",
+      start_permanent: Mix.env == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    []
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    []
+  end
+end