Git commits in Moodle 2.8.9 by Dani Palou

commit 512633461ae239677342b40d318803e15e1fd1aa
Author: Dani Palou <dani@moodle.com>
Date:   Mon, 26 Oct 2015 18:02:26 +0800
Tag:    v2.8.9

MDL-51861 enrol: Don't get all parts in get_enrolled_users with groups


commit 80bea94ffe8d4e19761fb6defd85c32adf069777
Author: Dani Palou <dani@moodle.com>
Date:   Tue, 20 Oct 2015 15:41:23 +0800
Tag:    v2.8.9

MDL-51829 admin: Set userquota setting as PARAM_INT


commit b961b1c142a1b697b7fc6a910e0db8177bab4aa3
Author: Dani Palou <dani@moodle.com>
Date:   Fri, 09 Oct 2015 15:23:53 +0800
Tag:    v2.8.9

MDL-51685 user: Support gravatar images in user_get_user_details