Git commits in Moodle 2.5.x by James Pratt

commit 7cd9c85868bd9e6b5eef15c364d424286511e59e
Author: James Pratt <me@jamiep.org>
Date:   Fri, 13 Dec 2013 18:15:41 +0800
Tag:    v2.5.5

MDL-43369 : quiz statistics - average across attempts

commit d8ca0c903c0c034bd704da0f7ca5d845e6dc973a
Author: James Pratt <me@jamiep.org>
Date:   Wed, 27 Nov 2013 13:49:19 +0800
Tag:    v2.5.4

MDL-43079 quiz statistics : fix stats graph when all grades zero

commit 161d67d8df7797cd52d43fa26db2a68a6c8c8d14
Author: Jamie Pratt <me@jamiep.org>
Date:   Tue, 02 Jul 2013 13:43:14 +0800
Tag:    v2.5.2

MDL-40388 Reset globals after each unit test

commit 81e01645d860cee7f382d2e51dbf1ab6f04843b1
Author: Jamie Pratt <me@jamiep.org>
Date:   Thu, 20 Jun 2013 14:18:42 +0800
Tag:    v2.5.2

MDL-40176 mock_submit method for testing

commit 397acdfda21852f23c3edbb83716db7260120b6b
Author: Jamie Pratt <me@jamiep.org>
Date:   Mon, 29 Apr 2013 19:16:04 +0800
Tag:    v2.5.0-rc1

MDL-39230 Question bank - refactor xml import