Getting Started URL in Pragmatic "Programming Elixir" 404s

[conroywhitney]

On page 4 of the Pragmatic Programmers' "Programming Elixir" book, there is a printed reference to http://elixir-lang.org/getting_started/1.html which 404s since the the page has been moved to http://elixir-lang.org/getting-started/introduction.html. Redirecting the old URL to the new one would remove one more point of friction for people starting out with Elixir.

I've opened #773 which uses jekyll-redirect-from to perform a redirect to getting-started/introduction.markdown. That way, no matter where that file ends up, people with the book will still be able to find it by typing in the printed URL.