OO-3288, OO-3297, OO-3291: add model for organisations and curriculums, add curriculum manager global role
OO-3307: update d3.js to version 4.13.0, update charts in portfolio, QTI statistics and course statistics
OO-3294 : remove some specific IE 7 and 8 hacks or specific javascript libraries, update jQuery to 3.3.1
no-jira: selenium test for assessment item with several different interactions (single choice, inline choice, text entry and gap match)
OO-3181: More reliable file storage when more than one user answer an evaluation with file upload element.
