Git commits in Moodle 2.2.2 by Henning Bostelmann

commit fb93cfac00e36718b88340801fa28d86d2acf344
Author: Henning Bostelmann <henning.bostelmann@york.ac.uk>
Date:   Tue, 27 Dec 2011 00:41:30 +0800
Tag:    v2.2.2

MDL-30031 Adaptive question behaviour: ignore invalid answers without penalty