Author: David Mudrák
MDL-37602 Add support for browsing the overall feedback files
http://git.moodle.org/gw?p=moodle.git;a=commit;h=88e79d8adbc85d7916f9e9e49b0681146a2b4826
http://github.com/moodle/moodle/commit/88e79d8adbc85d7916f9e9e49b0681146a2b4826
+ 2.5 en [areaoverallfeedbackattachment,mod_workshop]
+ 2.5 en [areaoverallfeedbackcontent,mod_workshop]