Git commits in Moodle 2.5.2 by Tim Lock

commit a5db1b54326d4bfba0fce8df268ff070c8454361
Author: Tim Lock <tim.lock@netspot.com.au>
Date:   Tue, 20 Aug 2013 09:04:16 +0800
Tag:    v2.5.2

MDL-41304: Hide and handle LDAP error when user not in context being checked

commit 448fc8ab1a2ab269f54d91eff2c8d648cad60c51
Author: Tim Lock <tim.lock@netspot.com.au>
Date:   Thu, 11 Jul 2013 16:33:34 +0800
Tag:    v2.5.2

MDL-40626 gradebook: Prevent incorrect override with multiline feedback

commit 6fe662302c1f504eb2d8d2faf2cb0c4906e20c9a
Author: Tim Lock <tim.lock@netspot.com.au>
Date:   Thu, 27 Jun 2013 08:52:28 +0800
Tag:    v2.5.2

MDL-40436: auth_ldap: Fixed warning when adding new LDAP users