Git commits in Moodle 2.9.4 by Barry Oosthuizen

commit 0e5b2e1997720e91f2845770d6808bc1a7faedaa
Author: Barry Oosthuizen <barry.oosthuizen@nottingham.ac.uk>
Date:   Tue, 27 Oct 2015 01:22:31 +0800
Tag:    v2.9.4

MDL-51913 report_stats: Make first column unique