Git commits in Moodle 2.3.7 by Jason Platts

commit ced8b30bd566fc808ef69fbcd6d7c602481d81fd
Author: Jason Platts <j.platts@open.ac.uk>
Date:   Tue, 02 Apr 2013 16:16:00 +0800
Tag:    v2.3.7

MDL-37942 Images with non-alphanumeric chars in file name won't export

commit d9c557099c3a0618e24336fd28863adceb575363
Author: Jason Platts <j.platts@open.ac.uk>
Date:   Tue, 26 Mar 2013 23:11:20 +0800
Tag:    v2.3.7

MDL-39342 stop users entering too long matching answers.