Author: Andrew Nicols
MDL-66722 forum: Add grade capability
Part of MDL-66074
http://git.moodle.org/gw?p=moodle.git;a=commit;h=5123b5c9d739e4321df0c87d866570097fee8d50
http://github.com/moodle/moodle/commit/5123b5c9d739e4321df0c87d866570097fee8d50
+ 3.8 en [forum:grade,mod_forum]