Git commits in Moodle 2.7.5 by Dan Poltawski

commit eedfb32ea0be8bfc23279deb04e446f0a829a013
Author: Dan Poltawski <dan@moodle.com>
Date:   Thu, 15 Jan 2015 00:59:46 +0800
Tag:    v2.7.5

MDL-46976 user: trim whitespace from input email address


commit 28b6d8949c4a7377fcad1abfb769c1d2876be561
Author: Dan Poltawski <dan@moodle.com>
Date:   Mon, 12 Jan 2015 22:54:28 +0800
Tag:    v2.7.5

MDL-31774 mod_lesson: fix for behat test


commit 895b61d6e6a725078817a33040e163163cfa0d38
Author: Dan Poltawski <dan@moodle.com>
Date:   Wed, 31 Dec 2014 23:12:34 +0800
Tag:    v2.7.5

MDL-35155 dml: add unit test which exposes substr problem


commit 1fdfd7127c8438ccd0ccb45410d66d224f26cd86
Author: Dan Poltawski <dan@moodle.com>
Date:   Wed, 31 Dec 2014 00:45:36 +0800
Tag:    v2.7.5

MDL-41166 assign: don't display portfolio button when no permissions