Git commits in Moodle 2.3.x by Valeriy Streltsov

commit 56565037dddc68f1c1185002c1384c16bbd1a84a
Author: Valeriy Streltsov <vostreltsov@gmail.com>
Date:   Sun, 04 Dec 2011 04:13:59 +0800
Tag:    v2.3.0-beta

MDL-30562 qtypes: extra_answer_fields & questionid_column_name public