Notalib/LYT — pull request #630 by saebekassebil (2013-11-28 09:49:40+00:00)
Title: Lowercase all resources in book.resources

This is not following the standard strictly, but since some books are
produced with filename case-issues, this fix is sadly necessary. It's very
unlikely that two files with the same filename but different casing will
occur.

This should go on `master` as well, when possible