Add nhk-easy-cli to example apps

Author: Zachary Scott

README.md

@@ -99,6 +99,7 @@ $ docker-compose run bintest
 ## Examples
 * `mruby-cli` itself is an app generated by `mruby-cli`, so you can explore this repo on how to build one.
 * [mruby-eso-research](https://github.com/hone/mruby-eso-research) - an app for managing crafting research in Elder Scrolls Online. It uses YAML as the data store.
+* [nhk-easy-cli](https://github.com/nhk-ruby/nhk-easy-cli) - a command-line client for reading NHK News Web Easy.
 
 ## mruby-cli Development