Developer credits

Git commits in Moodle 2.4.2 by Mark Nielsen

commit 53c66110a878f4f4644728138ea97c22990263e3
Author: Mark Nielsen <mark@moodlerooms.com>
Date:   Mon, 04 Mar 2013 06:52:09 +0800
Tag:    v2.4.2

MDL-36901: Remove system paths from exceptions

commit 2fc00b3a5d24ef960f2d4458a564f20e50ecb136
Author: Mark Nielsen <mark@moodlerooms.com>
Date:   Thu, 14 Feb 2013 01:21:03 +0800
Tag:    v2.4.2

MDL-32620: Fixing up white space in comment