More Elixir!

I had a great time at our last Intro To Elixir class. Let's do it again! Personally I learn more every time I do this.

Also, I'm planning 2 classes about Phoenix, the Elixir-based web application framework, and I want to give folks a chance to get familiar with Elixir before those classes.

Cross posted with RailsSchool: https://www.railsschool.org/l/intro-to-elixir-in-berkeley