Add earmark dependency.

.gitignore

@@ -4,3 +4,4 @@
 erl_crash.dump
 *.ez
 docs
+doc

mix.exs

@@ -43,6 +43,7 @@ defmodule Isn.Mixfile do
     [{:postgrex, "~> 0.9"},
      {:ecto, "~> 0.15"},
      {:eh, "~> 0.2", only: :dev},
-     {:ex_doc, "~> 0.8", only: :dev}]
+     {:ex_doc, "~> 0.8", only: :dev},
+     {:earmark, ">= 0.0.0", only: :dev}]
   end
 end

mix.lock

@@ -1,4 +1,5 @@
 %{"decimal": {:hex, :decimal, "1.1.0"},
+  "earmark": {:hex, :earmark, "0.1.17"},
   "ecto": {:hex, :ecto, "0.15.0"},
   "eh": {:hex, :eh, "0.2.0"},
   "ex_doc": {:hex, :ex_doc, "0.8.0"},