Update CHANGELOG, history, and documentation

README.md

@@ -33,7 +33,7 @@ Minimal Mistakes is a flexible two-column Jekyll theme, perfect for building per
 - Optional [header images](https://mmistakes.github.io/minimal-mistakes/docs/layouts/#headers), [custom sidebars](https://mmistakes.github.io/minimal-mistakes/docs/layouts/#sidebars), [table of contents](https://mmistakes.github.io/minimal-mistakes/docs/helpers/#table-of-contents), [galleries](https://mmistakes.github.io/minimal-mistakes/docs/helpers/#gallery), related posts, [breadcrumb links](https://mmistakes.github.io/minimal-mistakes/docs/configuration/#breadcrumb-navigation-beta), [navigation lists](https://mmistakes.github.io/minimal-mistakes/docs/helpers/#navigation-list), and more.
 - Commenting support (powered by [Disqus](https://disqus.com/), [Facebook](https://developers.facebook.com/docs/plugins/comments), Google+, [Discourse](https://www.discourse.org/), static-based via [Staticman](https://staticman.net/), and [utterances](https://utteranc.es/)).
 - [Google Analytics](https://www.google.com/analytics/) support.
-- UI localized text in English (default), Brazilian Portuguese (Português brasileiro), Catalan, Chinese, Danish, Dutch, French (Français), German (Deutsch), Greek, Hindi (हिंदी), Hungarian, Indonesian, Italian (Italiano), Japanese, Korean, Malayalam, Nepali (Nepalese), Persian (فارسی), Polish, Punjabi (ਪੰਜਾਬੀ), Romanian, Russian, Slovak, Spanish (Español), Swedish, Thai, Turkish (Türkçe), and Vietnamese.
+- UI localized text in English (default), Brazilian Portuguese (Português brasileiro), Catalan, Chinese, Danish, Dutch, French (Français), German (Deutsch), Greek, Hindi (हिंदी), Hungarian, Indonesian, Irish (Gaeilge), Italian (Italiano), Japanese, Korean, Malayalam, Nepali (Nepalese), Persian (فارسی), Polish, Punjabi (ਪੰਜਾਬੀ), Romanian, Russian, Slovak, Spanish (Español), Swedish, Thai, Turkish (Türkçe), and Vietnamese.
 
 ## Skins (color variations)