Git commits in Moodle 2.4.5 by Mohamed Alsharaf

commit 4978c2ae05fb1faa39eea68ad46f864d97063b53
Author: Mohamed Alsharaf <mohamed.alsharaf@gmail.com>
Date:   Wed, 12 Jun 2013 07:54:42 +0800
Tag:    v2.4.5

MDL-40091 book: revision must be incremented after editing a chapter