Author: Damyon Wiese
MDL-33600 Assign: Allow teachers to skip notifying students about grade update.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f7dc9871e76a051a59d9f4d069e24ff52beb4c73
http://github.com/moodle/moodle/commit/f7dc9871e76a051a59d9f4d069e24ff52beb4c73
+ 2.7 en [sendstudentnotifications,mod_assign]
+ 2.7 en [sendstudentnotifications_help,mod_assign]