Author: Damyon Wiese
MDL-58136 cache: Add a course completion cache
The last change added 1 db read per course per page which is not OK. Add a cache to compensate.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4d26fcd73702c9f3813224ef9c112ee6971e0424
http://github.com/moodle/moodle/commit/4d26fcd73702c9f3813224ef9c112ee6971e0424
+ 3.2 en [cachedef_coursecompletion,core_cache]