Author: Damyon Wiese
MDL-46548 grades: Add support for simplified one-step exports and update txt exporter
This ui change requires changes to the API so I have deprecated the old functions while maintaining
compatibility (if you don't mind lots of debugging).
http://git.moodle.org/gw?p=moodle.git;a=commit;h=cca51baa07a57c5190c60a9951c04cd5e96cbb5b
http://github.com/moodle/moodle/commit/cca51baa07a57c5190c60a9951c04cd5e96cbb5b
+ 2.8 en [exportformatoptions,core_grades]
+ 2.8 en [publishingoptions,core_grades]
+ 2.8 en [refreshpreview,core_grades]