.Epub file for CodeIgniter 3 User Manual

I recently installed the Kobo app for Android and have been meaning to try out the ePUB import, since ePUB is my preferred e-book format but I don't plan on always buying from Kobo. Seeing that an ePUB was available for the CI 3 documentation was perfect. The download had a .txt extension for some reason, so I manually renamed it. The Kobo app seems to have imported it just fine, although if there is a cover I'm not seeing that. Anyway, thanks to all who can take credit for the documentation and making it available this way!