Git commits in Moodle 2.3.4 by Matt Switlik

commit 76ab64b07e2314899fa352513622861879363205
Author: Matt Switlik <switlik@oakland.edu>
Date:   Fri, 19 Oct 2012 21:23:43 +0800
Tag:    v2.3.4

MDL-36061 gradebook: grade_item->refresh_grades doesn't propagate $userid