Author: Ankit Agarwal
MDL-43730 mod_book: Make chapter action links accessible
http://git.moodle.org/gw?p=moodle.git;a=commit;h=22255d8c78bfe04eb7d0d5b45d9ccb18c66ebc28
http://github.com/moodle/moodle/commit/22255d8c78bfe04eb7d0d5b45d9ccb18c66ebc28
+ 2.9 en [deletechapter,mod_book]
+ 2.9 en [editchapter,mod_book]
+ 2.9 en [hidechapter,mod_book]
+ 2.9 en [movechapterup,mod_book]
+ 2.9 en [movechapterdown,mod_book]
+ 2.9 en [showchapter,mod_book]