Cowboy Elixir Example

When I was new to Elixir, I found the docs for NineNines’ Cowboy web server totally incomprehensible - even with experience they’re still obtuse. So I made this heavily documented example of using Cowboy to serve static assets, dynamic requests, and websockets in Elixir. Updated today for Elixir 1.3 with fixed links and more docco. Hopefully it’ll save you the day I wasted puzzling it out!