Add alternative way to generate alphabet

Bump ffi from 1.9.18 to 1.12.2

Bump nokogiri from 1.8.1 to 1.10.8

style: add missing parentheses

Iterating over all keys of the map while keeping key order.

Update String.trim recipe

Merge pull request #13 from mustafaturan/source

Add 2017-10-21-how-to-connect-and-debug-elixir-or-phoenix-app-at-heroku.md

Update gems

Update 2016-05-18-convert-float-to-int.md

Adds list-with-alphabet and cancel-multiline-command recipes.

added new recipe

Count the number of words in a file.

Update README.md

Fix delimiter in split