Author: Davo Smith
MDL-29763 portfolio: add helpful description to the page
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1a6448fdedd8568a7da72864d4c68c73752e8efd
http://github.com/moodle/moodle/commit/1a6448fdedd8568a7da72864d4c68c73752e8efd
+ 3.0 en [intro,core_portfolio]
+ 3.0 en [showhide,core_portfolio]