Author: Tim Hunt
MDL-20636 Finish off converting question import.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f7c1dfaf79f32429ca702749b9f400159f7a6f8b
http://github.com/moodle/moodle/commit/f7c1dfaf79f32429ca702749b9f400159f7a6f8b
+ 2.1dev en [fileformat,core_question]
+ 2.1dev en [importwrongfiletype,core_question]
+ 2.1dev en [matchgradeserror,core_question]
+ 2.1dev en [matchgradesnearest,core_question]