title: Elixir .exs script "module is not loaded and could not be found" when using Mix
body: <p>I have a .exs script in my root directory that I want to be able to execute on the command line like <code>elixir my_script.exs</code>. My script was working before I initialized Mix in my project but now it does not work. I can see that Mix is placing the .beam files in the <code>ebin/</code> directory but apparently my script is not looking in there.</p>
  
  <p>What is the proper way to load custom modules into a .exs script?</p>