Author: Nadav Kavalerchik
MDL-52252 Tags: Add tags to modules (Resources and Activities)
http://git.moodle.org/gw?p=moodle.git;a=commit;h=dffcf46f432bd911e2ee0fdeb60bef8bc87871d9
http://github.com/moodle/moodle/commit/dffcf46f432bd911e2ee0fdeb60bef8bc87871d9
+ 3.1 en [tagarea_course_modules,core_tag]