koreader/koreader-base — pull request #56 by thotypous (2013-08-22 18:54:55+00:00)
Title: Implement util.realpath

Relative to [koreader#237](https://github.com/koreader/koreader/pull/237). I think it is right, please review @hwhw. The behavior differs a little from `FileChooser:compressPath` because it returns `nil` if the path does not exist. However, should not be a problem for the current usage of the function.