title: Convert a binary string to Hexadecimal and vice-versa in Elixir
body: <p>How do you convert a binary string to a Hexadecimal String and vice-versa in Elixir?</p>
  
  <p>There are a few posts on SO regarding this topic for other "main stream" languages. There's even an <a href="https://stackoverflow.com/a/624379/44080">SO post that benchmarks various C# implementations</a></p>
  
  <p>How do we do this in elixir?</p>
  
  <p>My implementation was too ugly to share... :(</p>