Author: Yuliya Bozhko
MDL-39923 badges: Send badge messages through internal messaging system
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f5d17c14eac1052ed2ab88f6e1ee54de4388982d
http://github.com/moodle/moodle/commit/f5d17c14eac1052ed2ab88f6e1ee54de4388982d
+ 2.6 en [attachment_help,core_badges]
+ 2.6 en [messageprovider:badgecreatornotice,core]
+ 2.6 en [messageprovider:badgerecipientnotice,core]