Git commits in Moodle 2.5.x by John Beedell

commit fb97f9a5cf51db044f34270abc503a3ce9e1f371
Author: John Beedell <j.beedell@open.ac.uk>
Date:   Thu, 24 Oct 2013 20:31:52 +0800
Tag:    v2.5.3

MDL-41473 book: Book html zip import, incorrect url produced for internal linking to other chapters