Author: Tim Hunt
MDL-20636 ddwtos and gapselect qtypes now very nearly work.
Todo rendering questions with files, and ddwtos javascript.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=706d06e29b0c2c5253a00b7cab0798cf0abd6b0d
http://github.com/moodle/moodle/commit/706d06e29b0c2c5253a00b7cab0798cf0abd6b0d