Git commits in Moodle 2.0.x by garethmorgan

commit 693838d37c644d02b60fb3c9d390234415daecb1
Author: garethmorgan <garethmorgan>
Date:   Tue, 11 Mar 2008 04:05:12 +0900
Tag:    v2.0.0-rc1

Populating $overridableroles and $assignableroles to make the roles tabs accessible.  MDL-13803.