Git commits in Moodle 2.5.x by Ashley Holman

commit fae11d2ef1b43909f964998fe7f17171fe99c210
Author: Ashley Holman <ashley@netspot.com.au>
Date:   Wed, 29 May 2013 12:07:38 +0800
Tag:    v2.5.2

MDL-34989 assign: Allow students to submit when grade is overriden

commit e9efc2baa2377ef811a5b6f382f003c6ab1aba4e
Author: Ashley Holman <ashley@netspot.com.au>
Date:   Wed, 29 May 2013 11:57:33 +0800
Tag:    v2.5.1

MDL-39743 assign: Fix missing capability check for "grant extension"

commit fd0d236dce9c1d4ae31d517fc12b298b17c5d16d
Author: Ashley Holman <ashley@netspot.com.au>
Date:   Mon, 20 May 2013 10:45:29 +0800
Tag:    v2.5.6

MDL-39740 grade: Fix grade_item::add_idnumber strict type checking

commit cd2b223dc7ba00d8869f34cb0e011fd8c160b228
Author: Ashley Holman <ashley@netspot.com.au>
Date:   Thu, 15 Nov 2012 10:59:22 +0800
Tag:    v2.5.0-beta

MDL-36616 repository: Fix direct linking to images in Flickr Public.