Git commits in Moodle 1.9.1 by garethmorgan

commit e83460ac869594206f9da472939845cb6eace852
Author: garethmorgan <garethmorgan>
Date:   Tue, 11 Mar 2008 04:01:32 +0900
Tag:    v1.9.1

Populated $overridableroles and $assignableroles to make roles tags accessible. MDL-13803