Git commits in Moodle 2.8.4 by Damyon Wiese

commit 41adb9578168d260ca7129f7b34cd52f0b1eb746
Author: Damyon Wiese <damyon@moodle.com>
Date:   Thu, 19 Feb 2015 17:28:59 +0800
Tag:    v2.8.4

MDL-49240 webservices: core_get_string and friends bad lang handling


commit fe5ecacb2bd149dd6ffdec925d6a194e555e169a
Author: Damyon Wiese <damyon@moodle.com>
Date:   Fri, 13 Feb 2015 11:41:43 +0800
Tag:    v2.8.4

MDL-49167 YUI: Fix for theme/yui_combo.php and $CFG->yuislashargs


commit 68b7d5ce4aa272e9db616a3f175afdf145c68bda
Author: Damyon Wiese <damyon@moodle.com>
Date:   Fri, 30 Jan 2015 14:36:46 +0800
Tag:    v2.8.4

MDL-48543 Mathjax: Update default config for JAWS Math player