Author: Tim Hunt
MDL-27408 Moved the question engine install/upgrade code into the proper place.
I have tested upgrade from the previous development version, and a clean install. Upgrade from 2.0 still needs more work.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=bb28e3bc5e5cb904cf2d39713723c16d4eedd403
http://github.com/moodle/moodle/commit/bb28e3bc5e5cb904cf2d39713723c16d4eedd403