Author: Andrew Davis
rating MDL-23908 improved rating role tips
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f9cd798c7eba8a204356b84f2b02d0bf6511e8b1
http://github.com/moodle/moodle/commit/f9cd798c7eba8a204356b84f2b02d0bf6511e8b1
+ 2.0 en [capabilitychecknotavailable,core_rating]
+ 2.0 en [rolewarning_help,core_rating]