Author: Michael Hawkins
MDL-70935 mod_lesson: Custom completion implementation
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7d594cb0d3e6aa92bbc01fa2bbb70b891399509b
http://github.com/moodle/moodle/commit/7d594cb0d3e6aa92bbc01fa2bbb70b891399509b
+ 3.11 en [completiondetail:reachend,mod_lesson]
+ 3.11 en [completiondetail:timespent,mod_lesson]